Tensions flared between pro-Palestinian student protesters and school administrators at several US universities Monday, as in-person classes were cancelled and demonstrators arrested.The protests, which began last week at Columbia University with a large group of demonstrators establishing a so-called “Gaza Solidarity Encampment” on school grounds, have spread to other campuses, including Yale, MIT and others.Some Jewish students at Columbia have reported intimidation and antisemitism amid the days-long protest, which is calling for the prestigious New York institution to divest from companies with ties to Israel.Classes were moved online Monday, with university president Nemat Shafik calling for a “reset” in an...