When war broke out in eastern Ukraine following Russia’s 2014 annexation of Crimea, Israel sent aid to the thousands of Jews who were displaced from the region. In the wake of that conflict, Ukraine’s small but vibrant Jewish community has been under severe stress. Officials from Israel’s defense and foreign ministries recently gathered to evaluate the potential wartime needs of Ukraine’s Jewish communities should Russia attack again. Last Friday, as Steven Hendrix, Shira Rubin, and David L. Stern note, an Israeli advisory urged citizens to leave the country immediately and said that it would begin to evacuate the family members...