AP Photo

One of the iron laws of Middle East politics for the last half-century has been that extremists go all the way and moderates tend to just go away. That is what made the march in Benghazi, Libya, so unusual last Friday. This time, the moderates did not just go away. They got together and stormed the headquarters of the Islamist militia Ansar al-Sharia, whose members are suspected of carrying out the attack on the U.S. consulate in Benghazi that resulted in the death of four Americans, including Ambassador Chris Stevens.