it. . ~ , ., us presidentjoe biden has spoken out against anti—semitism on university campuses after a rabbi associated with an ivy league university urged jewish students to leave campus. anti—israeli protesters at columbia university in new york city were reportedly heard shouting slogans in support of hamas and the al-qassam brigades, both recognised as terror groups by countries including the us and the uk. witnesses also reported hearing the protesters chanting that tel aviv — israel's largest city — should be "burned to the ground." in a whatsapp message, orthodoxjewish rabbi elie buechler told students that columbia university and the new york police department "could not guarantee jewish students' safety," telling them they should return home as soon as possible, apparently referring to the events. in his message to mark the beginning of thejewish holiday of passover, president biden said "this blatant anti—semitism