An assistant business professor at Columbia University and Israel native, Shai Davidai, was dumbfounded Monday morning after he was barred from entry into the campus’s “liberated zone.” Davidai and other pro-Israel demonstrators were outside the campus gate, hoping to enter, video footage posted to X showed. The encampment was set up at the university in opposition to Israel and in support of Palestinians amid the conflict in Gaza. Davidai claimed his identification card had been deactivated as school officials said they could not ensure his safety. An estimated 200 pro-Palestinian protesters were on the campus at the time, with the...