Since 9/11, America has presented itself to the world as a Christianist culture, no less antimodern and nostalgic for an idealized past than its Islamist foes. The master-narrative both sides share might sound like this: Once upon a time, the values of the righteous community coincided with those of the state. Home and land were harmoniously united under God. But through intellectual pride (read: science) and disobedience (read: human rights),...