The student protests of Israel's war with Hamas that have been creating friction at US universities escalated on Tuesday as new encampments sprouted and some colleges encouraged students to stay home and learn online, after dozens of arrests across the country. The protests had been bubbling for months but kicked into a higher gear after more than 100 pro-Palestinian demonstrators who had camped out on Columbia University's upper Manhattan campus were arrested last week. With tensions at Columbia continuing to run high and some students afraid to set foot on the campus, officials said the university will switch to hybrid...