Blowback is now a given. There is no sure way to avoid it, only to contain it. That can be done only by swiftly arming the moderates and pressing for as quick an end to the war as possible. Obama, as president of the United States, is in a position to save lives and avoid a regional calamity. His dithering has only made matters worse. Give the man an umbrella: He’s becoming a latter-day Neville Chamberlain.