this is "nightline." tonight he was once a white supremacist. >> did it feel good when you were talking about killing off another race? >> let me put it this way. it was what i would consider the equivalent of a drug high. >> now he tries hate online while helping others pull away from their radical views. as new details emerge, a look into the once secretive but now very visible of online hate speech. what main stream social media platforms are doing to fight growing toxic tide online before it once again spills into the streets. plus, her first interview with american tv. jamal khashoggi's fiance on their final farewell.

now a month after the journalist was killed, who ordered the killing and where is khashoggi's body? and this toddler takes on halloween with a new sense of freedom. >> say happy halloween! >> why his biggest treat has nothing to do with candy. "nightline" will be right back.

good evening. thank you for joining us. as violent hate-filled acts continue to make headlines, it's becoming very clear the line is blurring between on-line talk and real world violence. abc's kira phillips on the social media platforms trying to battle this growing wave of hate online. >> did it feel good when you were talking about killing off another race? >> it was what i would consider the equivalent of a drug high. it felt good for a short time because it did give me a sense of identity, a sense of community and purpose when i have none before. it was destroying me, and i also knew it was destroying everything around me. >> reporter: that "it" is hate. a powerful and lasting bigotry that once consumed christian, a reformed neo-nazi. >> why did you hate? >> i had gone from powerless to this perception of power, and

the only way i knew how to keep it at that point was to maintain a respect by hurting other people. >> reporter: christian may have changed, but hate hasn't. >> the propaganda that's online is very easy to find. >> reporter: in the digital age hate, for me people, is now just a post or a hash tag away. the fringe website gap where the pittsburgh shooter ranted against jewish people is now down, but hate speech still remains on mainstream sites like facebook and twitter with posts like this. the "new york times" released a report on instagram 11,696 examples of how hate thrives on social media. spotlighting anti-semitic comments with hash tags like jews did 9/11. the site is now removed many of these posts, but our own search revealed there's plenty more of hash tags and posts celebrating adolf hitler on each of the three major platforms.

>> what is it that someone sees and feels when they're online that pushes them to kill? >> there are so many marginalized young people who may be disenchanted with not having friends in real life, but they're actually finding these communities where there is a lot of camaraderie. there is a lot of fun at somebody else's expense, and then they get sucked into these things, and it's about desperation, or it's about revenge. if you feel like you've never had anything in your life, if you have been abused, if you have been traumatized, for me it was just abandonment. >> reporter: abandonment he felt at the age of 14. desperately searching for identity and acceptance. >> 27-year-old man at 14 years old walked up to me and recruited me. i was looking for family. >> reporter: christian became a self-proclaimed white supremacist starting a white power rock band, seen in this hbo documentary "skin heads usa,

soldiers of the race war." >> what are some of the lyrics you wish you never would have written. >> the holocaust is a lie. 6 million jews could never die. there's white pride all across america. what pride all across the world. things that i look back at now and frankly, i wonder where and who that person was because i don't know that person. >> reporter: but dillon roof did. he found christian's music on-line talking about a song in forums just months before he killed nine black parishioners at an ame church in charleston. >> those were my lyrics, words that i had written almost 30 years ago that still have an impact today, that still had consequences. those ideas that i put out into the world 30 years ago may have contributed to the death of innocent people. >> reporter: the internet, he says, accelerating the spread of hatred into hyper drive.

>> 30 years ago the internet didn't exist, and it was about books and pamphlets and standing in front of somebody to be recruited. now it's self-service. last year the adl saw a 57% increase in anti-semitic incidents. 57% spike was the single largest surge we have ever seen in 40 years of tracking this information. there simply is no precedent. >> reporter: a precedent he says due in part to a now contentious political environment. >> the fact of the matter is we have elected officials at the highest levels, including our president, who use language that literally is torn from the pages of white supremacists. >> you will not replace us. >> reporter: president trump's failure to immediately condemn the white nationalist march and deadly attack in charlottesville drew widespread criticism. >> i think there's blame on both sides. >> for a small subset of the group, particularly those that

are disaffected and violence prone, it may encourage them to commit acts of violence. >> that could be magnified by online echo chambers. even though gab, the controversial site, often used by the pittsburgh shooter and others on the far right is currently without a host. the creator has promised to come back. writing in a statement that gab is working with law enforcement and we we will exercise every possible avenue to keep gab online and defend free speech. the line between free speech and online harassment can be thin. ask just erin. >> i received tens of thousands of pieces of hate speech and death threats across twitter, facebook, instagram, youtube on the sole basis of the fact that i was born jewish. >> reporter: the 27-year-old says while she was running for congress, she was targeted by an anti-semitic website "the daily stormer" in a so-called troll storm.

a barrage of derogatory and racist messages dispatched online. >> i saw my face with a yellow jew star next to a monster. the e-mail read get back to israel. these digital companies need to step up and recognize the role that they have to play in protecting innocent people, innocent lives all across this country and around the world. >> reporter: in separate statements about posts we discovered and monitoring hate speech and hate groups on their sites, instagram, twitter, and facebook stressed they are working tirelessly to combat the problem, while pointing to their individual policies prohibiting hate speech and groups saying they were working to enforce their rules. both facebook and instagram specifically noted they had removed the content we pointed out to them. as for christian, he left the

skin heads in his early 20s. >> i found people that actually gave me the compassion when i least deserved it. of the people i least deserved it from. demonization had been destroyed. it had been replaced by humanization. >> christian now runs the free radicals project, an online campaign to rid radicalization on the web and in our communities. >> we all have the ability to affect the people closest to us, and we need to start paying attention and having difficult conversations. >> difficult conversations in a complex cyber driven world and increasingly necessary to avoid devastating consequences. >> so whose responsibility is it? >> it's america's responsibility. it's all of our responsibility. >> for nightline, i'm keira phillips, in new york. next, washington post writer jamal khashoggi's fiance details the last time she saw him. (acapella) whoa!

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our holidays don't all look the same. am i saying it well, l'chaim? l'chaim? and maybe that's what makes us great. make the dream yours. ikea. it's been a it's been almost one month since journalist jamal khashoggi died, and exactly what happened inside those consulate walls still remain unclear. in the first interview with american tv his fiance sits down breaking us inside the final days and moments with him. >> translator: imagine a man 60 years old who has accomplished many things in life. >> reporter: these are the last known images of washington post columnist jamal khashoggi. >> translator: he was a patriot. he loved his country. he did a lot for his country. >> reporter: as he said good-bye

to his fiance outside the saudi consulate in istanbul, they never imaged it would be their final farewell. >> translator: whatever he thought or did, he didn't deserve this at all. >> reporter: khashoggi, a saudi national, one of the best known and vocal critics of the ruling royal family was silenced that day. >> in many ways he was among the most dangerous because he lived in exile in washington d.c. he wrote for the washington post, the paper in the capital of the country that saudi arabia is most reliant on. >> reporter: his face has become a narrative of shifting sands and the center of an ongoing diplomatic crisis. just four days earlier the happy couple seen here getting paperwork for their wedding, but khashoggi is told he needs documents from the saudi consulate. he told a teacher he was afraid, worried he could be captured and taken back to saudi. >> translator: the worst he thought he would be detained.

>> reporter: instead that day he was greeted warmly, even given tee. when khashoggi went back to that paperwork four days later his guard was lowered. no longer afraid and unable to imagine what horror was waiting. after waiting five hours outside the consulate, she reported him missing. >> translator: i mentioned my best friend about jamal not coming out, he told me that there could be a possibility of him getting hurt. i thought that something really bad happened. i started to get worried. >> reporter: soon after a confusing saudi account began to emerge. >> we begin with new reporting. the mystery deepening. grim new details tonight in the disappearance of washington post writer jamal khashoggi. >> crowned prince mohammed bin salamon saying that he left the consulate after a few minutes or one hour, adding we have nothing to hide. >> we were thinking, okay, maybe this is, you know, a sort of mini-hostage situation and that best case scenario we're crossing our fingers that

they would just let him go. >> on october 7th, five days after his disappearance, turkish officials declared that khashoggi was killed inside the consulate. the saudi government immediately responded calling it a baseless allegation. >> the deepening crisis over the missing washington post columnist who appears to have been murdered inside the saudi consulate in istanbul. >> reporter: president trump getting tough questions about america's long-time ally. >> we don't like it, john. we don't like it, and we don't like it even a little bit. >> reporter: the mystery deepened. on october 14th turkish officials allege the 15 saudi nationals had landed in turkey the same day khashoggi vanished and then checked into this hotel. the team then backed up at the back of the consulate allegedly lay in wait for jamal khashoggi who went through the front door a few hours later and never emerged. the surveillance video captured the alleged hit squad entering the compound just before him. >> with the announcement of those planes landing, the credentials of those who

arrived, i realized something i thought of the possibility of him being killed. >> reporter: on october 15th with speculation mounting, a cleaning crew is spotted entering the consulate and then turkish officials are finally allowed to investigate. >> a completely chaotic scene here in istanbul outside the saudi consulate. this is the moment we've been waiting for. prosecutors and investigators finally turn up to find out what has happened 13 days after jamal khashoggi disappeared. >> and just when it seemed the story couldn't get any more bizarre, claims by turkish officials that a recording was made of the murder and dismemberment of the celebrated journalist and continued denials by the saudis. then october 20th a stunning admission. the saudi kingdom claimed that a fist fight at the consulate had indeed led to khashoggi's death. it took 17 days for them to admit they killed him. first saying in a fist fight. later saying he died in a choke hold position.

a claim many found hard to believe when so many signs pointed to premeditated murder. his bereaved fiance still hoping for closure, desperate for answers. >> translator: as of today, we still don't know where jamal's body is. there is still no explanation about this. he did not have a funeral yet. this is not acceptable in islamic rules. >> what is your message to the united states, to president trump? >> translator: in reality the language of diplomacy is just not enough. this is a very big breaking md ortant allies. president trump's first overseas trip was to the oil-rich kingdom. the president says he needs more information, but he has made it clear he won't sacrifice $110 billion weapons deal.

>> i don't want to lose all of that investment that's being made in our country. i don't want to lose a million jobs. >> the fact that so many americans, in particular, that have been outraged and saddened by what has happened to jamal should fundamentally force a rethink in the u.s.-saudi relationship. >> reporter: khashoggi's killing flies in the face of the crowned prince's recent p.r. campaign, a push to instill what he calls "moderate islam," which is open to the world. recently nightline was given a glimpse into this ancient kingdom, a carefully curated effort to showcase how the country is moderni >> for the first time driving on the northern ring road. >> reporter: the grim reality of khashoggi is starting to turn attention back to an even more brutal reality. in yemen, saudi arabia has been involved in a little noticed war, now its in third year. one of the worst humanitarian

crisis in the world. i saw its effects firsthand when i reported the devastated country earlier this year. there, a crush of desperate parents and hungry children too small for their age. >> the doctor said she is measure, you the circumference of the top of her arm, around what is her bicep. we can see here it's just crossed over into the red, which is severely malnourished. she cry? how is that? >> reporter: jamal's parting words were a call to open the eyes of the arab world of what was really going on around them, to fight for change, but it would cost him his life. the words of his last piece for the washington post, haunting. >> we need to provide a platform for arab voices who suffer from poverty, mismanagement, and poor education. isolated from the influence of nationalist government spreading hate through propaganda. ordinary people in the arab

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finally tonight, the inspiring toddler taking a very big step. 2-year-old roman bingle has spina bifida and is powering up for halloween practicing walking in his costume. he stunned neighbors as one-half of the super mario brothers showing his super strength without crutches. he captured hearts on the internet when he took his first steps in a video that went viral.e r llitis st tck-or-trting tomorrow. how cool is that? it was america ultra marathon runner dean carnasas who said the human body has limitations.

the human spirit is boundless. thank you for watching "nightline" and thanks for the company, america. good night.