u.k. britain's now identified the man they say beheaded journal itself james foley in syria. hundreds of brits and europeans are believed to be fighting alongside isis. the ministry of defense says there are more british muslims fighting for isis than for britain. but they are, of course, only a fraction of britain's entire muslim society. and the muslim council of britain has been extremely clear that there's nothing islamic about what isis is doing. this weekend, nbc's keir sims met some. >> there are a lot of people who feel they have a duty to protect themselves and defend against america. >> killing a journalist isn't protecting yourself. >> the vital question is, who's really to blame for the death of james foley? i believe it's the foreign policy of obama. >> it's the man who put that knife in his neck surely. >> well, you've got to ask, why was this particular man chosen? it seems like he was chosen because he was an american citizen. >> that is unbelievable. mohammed abassi is co-director of the association of british muslims. he's consulted on several films about terrorism and extremists. how are these mostly young men being recruited in britain? is it through rad