Obama is right to continue emphasizing the all-important distinction between religious views compatible with democratic pluralism and those that aren’t. As he deals with the fallout of the attack, he must continue to separate Islamic extremism from Islam as a whole. But his words at Fort Hood, while comforting, do not really come to grips with the problem. America does not face a threat from the perversion of faith in general. We face a threat from the perversion of one faith in particular. The president needs to dip into his reservoir of good will to remind mainstream Muslims of their special responsibility. If militant Islamism is a distortion of their moderate beliefs, only their beliefs can defeat it.