Thirteen federal judges appointed by Donald Trump sent a letter to Columbia University’s president Monday saying they won’t hire law clerks from the university in response to what they called the school’s failure to deal with pro-Palestinian protests over the war in Gaza.

Columbia “has become ground zero for the explosion of student disruptions, anti-Semitism, and hatred for diverse viewpoints on campuses across the Nation,” stated the letter signed by the judges, including James Ho of the U.S. Court of Appeals for the Fifth Circuit and Elizabeth Branch of the Eleventh Circuit.