mustafa ceyik runs a hostel right behind the blue mosque. the attack left him shocked and sad -- but he is also angry with the turkish government. >> our intelligence services obviously failed. although you can't completely prevent such attacks. the victims were tourists, but i think the suicide bomber was out to harm turkey. so we were his target. reporter: journalist ezgi basaran says that represents a turn-around. she accuses the turkish government of having supported jihadist groups in syria. for years she has warned of the dangers of silently tolerating the i.s. >> turkey turned a blind eye to the activities of these groups. we found out that there was a taxi service for jihadis in the border town of kilis. it allowed fighters to cross into and out of syria freely. reporter: president recep tayyip erdogan dismisses any such allegations. but his critics insist that he treats militant kurds as a greater enemy than i.s. terrorists. and conspiracy theories are making the rounds among his supporters. >> incidents like this are primarily aime