By Barrett Holman Leak Barrett Holman Leak SAN DIEGO — Jewish students at UCLA are physically blocked from attending classes by Palestinian activists. Jewish students at SDSU must be escorted to and from classes in the face of antisemitic chants and threats. Palestinian protesters on American campuses burn the American flag and hoist the Palestinian flag over U.S. college and university buildings. Palestinian activists who have been banned in Germany for antisemitism speak boldly at a university rally in New York City in favor of Palestinian “resistance,” which in their view includes open prom…