From David Stockman, a scathing essay with which I agree:
So what we have now in the middle east is a replay of the bloody religious wars that once traumatized the West when Protestants accused Catholics of being idolatrous heretics and the latter returned the favor by putting Protestants to the stakes and the racks. In the present instance, the real war being waged by ISIS is not against the liberties which pertain on the streets of New York City, but in Leupp’s words, “against the Shiites, Christians, Yezidis, secularists, and others it sees as unbelievers and as stooges of the west. But its primary target is the Shiites”.