Airlines have a very strong incentive not to risk their planes getting shot out of the sky. And it’s not just a hypothetical fear. During the Cold War, the Soviet Union shot down a South Korean passenger jet and the United States shot down an Iranian passenger jet, both mistaken for hostile military aircraft, killing hundreds of people. During more recent conflicts, Russian-backed militias shot down a Malaysian passenger jet over Ukraine in 2014 and the Iranian military shot down a Ukrainian passenger jet over Iran in 2020. So when Israel and Iran started rattling the saber at each other last …