Why did ISIS attack Paris?

As to "Why did ISIS attack Paris has got to be one of the dumbest questions ever posed in the history of man kind. Yet...people are seriously posing the question and pretending that there is some deep answer that isn't immediatly apparent: like this guy does in an article in the Atlantic: http://ift.tt/1SBykee

Just Amazing.

Are we (the West) really this ignorant, or are we pretending to be so ignorant? I just don't know.

via International Skeptics Forum http://ift.tt/1SByZMH