AP Photo

To measure the sturdiness of King Abdullah of Jordan against the tide of upheaval sweeping the Arab world, go to Tafila, an impoverished town tucked into a sandy bowl encircled by the Moabite Mountains 110 miles south of the royal seat of Amman. Outside the courthouse where four youths recently awaited trial on charges of cursing the king, a crime punishable in this hitherto deferential...