MIDDLE EAST AFFAIRS: From Tunisia to Syria, the uprisings of 2011 showed how revolutions often give way to chaos or renewed authoritarianism, a lesson Jerusalem cannot ignore as Iran convulses.

On January 14, 2011, Tunisian dictator Zine El Abidine Ben Ali was forced to resign, after four weeks of revolt in the north African country. It was a first major scalp for the wave of upheaval known ...