I know Muslims in real life who think like this. I've also heard some speculate that the ISIL fighters have had some kind of black magic performed on them.
Lol Az, that sounds about right, "It was the magic wot dun it!".
I haven't talk to many muslims yet to get a feel for this one, i.e conspiracy or otherwise. That said I've heard plenty say the Juice were behind 911 and the mess that is Syria(if they can turn muslim against muslim then they can go about their wicked mischeif untwarted) or USA gov-Boston bombing or UK gov -Rigby murder etc so I won't be surprised if this turns out to be the case too.