I think its fairly clear that they had done very little planning and were completely unprepared for what would happen after the attacks. They even seemed to thi

I think its fairly clear that they had done very little planning and were completely unprepared for what would happen after the attacks. They even seemed to think they could just carry on with their lives and not get noticed. But I don't think that is a reason to discount an extremist religious motivation, although it may be only part of it.