Robert Kraft, an alumnus of Columbia, suggested he would withhold donations to the school. Other alumni are keeping quiet. : Robert Kraft, an alumnus of Columbia, suggested he would withhold donations to the school. Other alumni are keeping quiet. By Andrew Ross Sorkin, Ravi Mattu, Bernhard Warner, Sarah Kessler, Michael J. de la Merced, Lauren Hirsch and Ephrat Livni Top American colleges are in turmoil, with dozens of pro-Palestinian student protesters having been arrested at N.Y.U. and Yale amid new worries about antisemitism on campus. University administrators have been struggling to restore calm, and have taken heavy criticism from students and lawmakers alike.