CNN CNN Newsroom Live July 18, 2015 09:36:00
True believers in the religion. they are individuals who need an excuse for what's wrong in their life. >> reporter: dylann roof same sort of thing? >> dylann roof is identical. you show me a terrorist and i will show you a violent person looking for something to justify their violence. >> reporter: much of law enforcement agrees that's the potency of isis a slick social media campaign that to most americans seems ludicrous, but to someone disenfranchised who feels inept, the message cuts through. >> they give you a cake with little chocolate chips of truth, and the cake itself is poison. it t...