What could the Council on American Islamic Relations (CAIR) and the National Iranian American Council (NIAC) possibly have in common? CAIR founders had close ties to Hamas, Palestinian Sunni Islamic extremists. NIAC and its main spokesman, Trita Parsi, have become apologists for the regime in Tehran, which exports a rival Shiite brand of Islamic extremism. Sunnis and Shias. We all know the story. They hate each other worse than Irish Catholics and Irish Protestants. Right? Well, no. As I pointed out in Countdown to Crisis: the Coming Nuclear Showdown with Iran, Sunnis and Shias get along just fine when it...