James S. Robbins writes in NRO that the Jihadis do what they do more out of the desire for violence than any high minded conviction. A point that I've tried to make many times. Robbins conclusion about Mohammed Atta;
He was a sociopath who found a compelling vehicle in radical Islam to legitimize and externalize his need to destroy.
It is useless to wonder why, or to cavil with these guys. They must be met with force and neutralized one way or another.