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But despite the horrific attacks, the reasons against a large-scale land invasion by U.S. and NATO forces against ISIS in Iraq and Syria remain, such an invasion will deepen the extremist narrative of clash of civilization between the West and Muslims, will insert our militaries into a deep, nasty, and unwinnable civil war, and the invading force will eventually be responsible for reconstructing a semblance of order and governance in (a) chaotic region infected with sectarian divisions.