Countless Jewish families welcomed their children home from college this holiday season, giving tens of thousands a refuge from what has become horrifyingly normal behavior on their campuses: virulent anti-Semitism. It’s no secret that Jew-hatred has exploded online and in our streets the last few years. But it has also embedded itself in our college campuses, leaving countless students feeling unwelcome and unsafe. Among family and friends, Jewish students aren’t subjected to doorways with “Kill the Jews” scrawled on them. They aren’t forced to disguise their Star of David necklaces or take a circuitous route to class. They don’t have...