Police have carried out raids at Columbia University on Tuesday to stop pro-Palestinian demonstrations, bursting into an administration building protesters had taken over and making dozens of arrests. A statement released by a Columbia spokesperson said New York City officers entered the campus after the university requested help. A tent encampment on the school’s grounds to protest the Israel-Hamas war was cleared, and the university’s Hamilton Hall was emptied. “After the University learned overnight that Hamilton Hall had been occupied, vandalised, and blockaded, we were left with no choice…