"Behold!" reads an official police notice on the waiting-room wall at the Bethnal Green police station, in the East London borough of Tower Hamlets. "Fear from people should not prevent one from saying the truth if he knows it." It is a hadith saying of the Prophet Muhammad ... Whether Iraq is a "cause" of terror or a mere pretext is a difficult question. Radical jihadists have threatened and attacked countries that opted out of the Iraq conflict. And if Iraq "causes" someone to become a suicide bomber, it is almost certainly not in the way Western liberals understand political...