It is time for the United States to declare a truce with the Muslim world, and radical Islam in particular.This may sound like a naive, even defeatist statement in the context of the 9-11 Commission Report's reminder that the United States remains very much at war with "Islamist terrorism" and the ideas behind it. Yet a truce (Arabic hudna) rather than an increasingly dangerous "clash of civilizations" is the only way to avoid a long, ultimately catastrophic conflict. And it's up to Europe to be the good broker.