You can be pretty confident that as conflicts develop, they will become more extremist. The most brutal, harshest groups will take over. That’s what happens when violence becomes the means of interaction. It’s almost automatic. That’s true in neighborhoods, it’s true in international affairs. That’s where ISIS comes from. If the West manages to destroy ISIS, they will have something more extreme on their hands.

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Chomsky says:  "If they manage to destroy ISIS, they will have something more extreme on their hands." Not if the west. Change for clearity.