What bugs me about all this is that the 'terrorists' so far have shown surprisingly little sophistication in the attacks they have made, mostly because they didn't have to.
That bugs you? I'm pretty grateful for it, personally.
The jihadists' greatest strength is also their greatest weakness: they're not very rational. If they were rational then they'd figure out that there are more efficient ways to kill random civilians than anything they've explored so far. On the other hand, if they were rational then they'd figure out that killing random civilians to please an invisible sky wizard is a pretty fucking stupid way to spend your life anyway.