AP Photo

On Oct. 18, a suicide bomber in southeastern Iran killed at least 42 people and wounded scores of others in a lethal attack on senior commanders of Iran's Islamic Revolutionary Guard Corps (IRGC).

The Shiite IRGC doesn't make an especially sympathetic victim -- it has quashed dissent in Iran since the 1979 Islamic Revolution and is now helping spearhead an autocracy there. The group taking credit for the attack, Jundallah (God's Soldiers), also known as the People's Resistance Movement of Iran, is a Sunni organization. It seeks full rights for Baluch tribesfolk specifically and Sunni Muslims generally either within a majority Shiite Iran or as a separate state. Hence it battles the Shiite clerics, secular autocrats, military, and paramilitary forces who rule Iran with an iron...