. >> robert bowers stormed into this synague and said, "i just want to kill jews." >> narrator: a ground-breaking frtline propublica investigation. >> he's indetifying jews as a threat to "our people". what he means there is "white people." n arrator: ...of violent neo-nazis. >> what do you think was going on in this house? >> they were making bombs. >> narrator: through interviews th insiders. >> nar tor: reporter a.c. thomps uncovers the movements ecthods. >> they are activeruiting military members. does that surprise you? >> narrator: and exposes their hate. >> "make ameria great again." in order to make america gat again, you'd have to make america white again. >> narrator: tonight, "documenting hate: new american nazis". >> frontline is made possible bi contris to your pbs station from viewers like you. thank you. g.d by the corporation for public broadcast major support is provided by the john d. and catherine t. macarthur foundation, committed to building a more just, verdan aceful world. more information at macfound.org. the ford foundation: working with visionaries on the frontlines of s

.>> hompson: robert bowers storms into the tree of life synagogue with an ar-15 and allegedly kills 11 jewish worshippers. >> 7-1: suspect's talking about "all these jews need to die." >> we have multiple casualties inside the synagogue. we have three officers who have been shot. >> members of the tree of lifena gue, conducting a peaceful service in their place of worship, were brutally murdere by a gunman targeting them simply because of their faith. >> thompson: another act of terror in america, the coury again left to ask, "where does this hate come from? could it have been prevented?" >> it's just been 24 hoursince robert bowers stormed into this synagogue and said, "i just want to kill jews." >> thompson: over the past few years, i've been reportingon resurgent white supremacist movement. ve seen its ideas migrate into the mainstream. i've seen violence in cities across the country. and now this: the deadliest known attack on theom jewishmunity in american history. i fear there will be more to more to come. ♪ >> blood and soil! >> blood and soil! >> today's alt-right "unite th rig

and then also robert bower. >> so that's the statement -- >> prevents domestic terrorism. >> but the actual charge. was the actual charge domestic terrorism? >> you're not going to find an actual charge of domestic terrorism out there. if you look at title 18 -- >> well, it says here -- but at the san bernardino shooting or the orlando pulse nightclub shooting, they were designated and charged as domestic terrorist incidents. >> they were charged -- i'd have to go back and look. they were charged likely with -- if there was a connection to a foreign terrorist organization, it would fall under 18 usc 23 a or b. >> so because -- because the perpetrator was muslim, they are -- doesn't it seem that because the perpetrator is muslim -- >> that's not correct. >> -- that the designation would say it's a foreign organization? >> no, that's not correct. if you -- that is not correct. >> okay. can you explain? >> yeah. >> why? >> home-grown violent extremists -- most of the people we arrest in the united states, home-grown violent extremists, self-radicalized, born in the u.s., doesn't matter