So realistically speaking, a totalitarian (but secular) state kept the Sunni-Shia bloodbath at bay. We knocked that totalitarian state over and replaced it with a weak Sunni one. The end result was a no man's land of violence up there in that corner where Saddam used to gas his own people. So yeah. "We created the problem (ISIS) through the Iraq War" is spot on. That particular flavor of death cult wasn't inevitable but an armchair foreign policy quarterback would have predicted something between Phalangists and Boko Haram. Lo and Behold.

Cynically speaking, ISIS will be a European problem. Syrians aren't going to come to the US in droves because it's a bitch to get hyar from thar. This is why the muslim ghettos in Paris are fomenting more dissent than the muslim ghettos in Detroit or Toronto - only the tonier refugees make it across the Atlantic. It's saber-rattling of the worst sort; it'll do nothing to quell the indigenous unrest and it'll kill a lot of the most vulnerable people. But hey - it's been damn near fifteen years since we started responding to an act of crime as if it were an act of war and there's no reason to stop now. We sowed this shit 100 years ago and the dragon's teeth be sprouting.