Observing the conversation regarding the abhorrent evil that is ISIS, I have come to two conclusions.
One - worldview matters. Two - some, even when their worldview is patently failing, will continue to stick their head in the sand.
ISIS is such an obvious evil that is hard to find sufficient adjectives to describe its horror. None of rational turn of mind will deny that evil. The challenge is to interpret it within a framework that makes sense. Whence this evil? Who are these people? Why do they act this way? Out of the answers to such questions will be formed a practical policy to defeat the evil itself.