Minouche Shafik, president of Columbia University (NY), writes: Last December, three of my peers testified before the House Committee on Education and the Workforce about antisemitism on university campuses. Tomorrow I will have the opportunity to appear before the same committee and share what we have learned as we battle this ancient hatred at Columbia University. Oct. 7 was a day, like Sept. 11, 2001, that changed the world. None of us anticipated the horrific Hamas terrorist attack in Israel, nor the impact of those events across universities like Columbia and all of American society.