Here's a simple question.
Is Islamic terrorism the product of:
Option A: A tiny, fringe element. Dead-enders. Crazies. -or-
Option B: A growing puritanical movement. Fanatics.
Before you answer this question, consider this.
The popular belief, from individuals to the government, is that option A is correct. This makes sense. More than a decade of experience "fighting" al Qaeda supports it.