By Judah Bernstein The Jan. 15 assault on a synagogue in Colleyville, Texas, has renewed the familiar yet always harrowing question: How should Jews combat antisemitism? Contemporary Jewish leaders, organizations and pundits have offered various answers to this question in the past, but they rarely target the specific socioeconomic, technological, legal or other systems that give antisemitism life today. Beyond synagogue security measures, American Jews have yet to rally around a coherent policy agenda that may help diminish antisemitic violence. One obstacle is the way so many Jews and their spokespeople view antisemitism: as ineradicable and inevitable and otherwise unique...