About 16,000 Ukrainian refugees have already arrived in Israel, but two-thirds of them have no Jewish roots. While most of the 3.7 million Ukrainians fleeing the war are moving to neighboring European countries, the floods have shocked Israel, which has a population of 9.3 million. Some Israeli officials fear that an uncontrolled wave of refugees could undermine the country’s Jewish majority. Israel’s Central Bureau of Statistics said in 2021 that 74% of Israel’s population identifies as Jewish, and 21% are Arab. The other 5% are largely non-Arab Christians, most of whom were or were born among the approximately one million...