Columbia University failed to bring disruptive anti-Israel protests under control Monday, as hundreds of protesters openly defied the school’s 2 p.m. ultimatum to vacate the campus encampment or face suspension and loss of access to dorms and class buildings. “We will not back down,” student leaders proclaimed in a statement before the deadline expired. As the deadline ticked away, hundreds of protesters remained on campus, beating drums and chanting slogans like “free, free, free Palestine” as they marched, beat drums and lounged around the tent city. Police sources told The Post Monday afternoon that busloads of NYPD officers were standing...
