Avi Nadiv is tired of the war. But he also hopes it doesn’t end any time soon. Mr. Nadiv is the deputy mayor of Metula, a town at the northernmost tip of Israel that has become almost lifeless as the U.S.-Israeli war against Iran enters its sixth week. That conflict quickly spawned a violent second front when Lebanon’s Hezbollah militia, which is allied with Tehran, launched a volley of rockets in...