The Middle East is on the brink of a major conflict after Israel’s dramatic assassination of top Hamas leader Ismail Haniyeh in Tehran and a deadly airstrike on Hezbollah’s military chief in Beirut. These moves, coupled with recent Israeli raids in Syria and new U.S. military action in Iraq, have sparked outrage and vows of severe retaliation from Iran and its allies. As the region reels from these high-stakes attacks, global leaders and ordinary citizens alike fear that the escalating violence...