One New Yorker learned the hard way that waving an American flag on a college campus is the fastest way to make enemies these days. Ami Horowitz, a self-described “guerrilla journalist,” said he was beaten, headbutted and punched by an angry mob of anti-Israel protesters on the uptown campus of CUNY’s City College of New York on Friday. The aggressive reception came after Horowitz claimed to have shown up to the pro-Palestinian encampment armed only with an American flag. 5 A New York filmmaker claims to have been beaten by an aggressive pro-Palestinian mob at CUNY’s City College on Friday...