Louis Shenker, a 21-year-old junior at the University of Massachusetts, Amherst, just wanted his MAGA hat back from the graduate student who ripped it off his head on campus. He wore the hat to a December 6, 2018 protest organized by the university’s graduate student union against Trump and local police. Video shows that when Louis, who is 5’6’’ and 140 pounds, arrived wearing the MAGA hat and holding a large sign, he was immediately surrounded by a hostile mob of older grad students cursing at him and calling him a white supremacist. A woman lunged from the mob and...