David Crary NEW YORK (AP) — For Congress, the allegations of anti-Semitism directed toward Rep. Ilhan Omar have no precedent. Yet on college campuses, in state legislatures and in many other venues nationwide, the polarized debate about Israel is a familiar conflict and likely to intensify in the months and years ahead. Fueled by a wave of youthful activists, including many Jews aligning with Muslims, criticism of Israel’s policies toward the Palestinians has grown in volume and scope, with persistent calls for boycotts and disinvestment. Pro-Israel organizations and politicians have…