The gunning down of Hajj Hassan Hollo al-Laqqis, a high-ranking Hizballah commander and close crony of Secretary-General Hassan Nasrallah, raised the stakes of the clandestine war running between Saudi Arabia and Iran, two weeks after two suicide bombers blew themselves up outside the Iranian embassy in Beirut. The Hizballah officer was killed by five shots to the head and throat in the underground parking lot of his home in the Hadath neighborhood southwest of Beirut, when he returned home from work after midnight Tuesday, Dec. 3. The Hizballah statement, which said: “Israel is automatically held responsible for the crime,” described...