Pope Francis set off a diplomatic storm yesterday when he referred to the genocide of the Armenians at a service in St. Peter's Basilica this weekend. The Turkish Foreign Ministry denounced the remarks as baseless and unfair, and summoned the Vatican's Turkish representative to appear for a tongue lashing. By the standards of Vatican diplomacy, this was an explosion. Conscious of the vulnerability of Christian minorities around the world, popes are usually circumspect when touching on controversial diplomatic topics. Francis’ words will certainly provoke a harsh response from Turkey where, despite very slow and painful progress at coming to grips...