IS the Islamic Republic facing a growing revolt by Iran's Arab minority? Until a couple of years ago, the question would have sounded naive. In the '80s, Arab-Iranians fought bravely against Saddam Hussein's forces, even though they were linked to the invading Iraqis by ethnic, tribal, linguistic and religious ties going back 1,300 years. Data from the Foundation for the Martyrs (which is supposed to look after war veterans and families of the war dead) show that the number of Arab-Iranians who died for the fatherland was proportionally four times higher than Iranians from other ethnic backgrounds. In the last...