By Harmeet Kaur, CNN (CNN) — As university administrators and law enforcement crack down on campus protests over Israel’s war in Gaza, they’re invoking a familiar trope: the “outside agitator.” On April 18, the New York Police Department arrested more than a hundred people in connection with pro-Palestinian protests at Columbia University, kicking off a wave of similar demonstrations at other US colleges and universities. Following the NYPD’s arrest of more than 130 protesters at New York University earlier this week, New York City Mayor Eric Adams said in a news conference that “outside agitators” were disrupting the city and...