The resignation of Harvard’s president, Claudine Gay, on Tuesday followed a lengthening catalogue of plagiarism allegations that appeared to steadily sap her support among the university’s faculty, students and alumni. But for many of Gay’s critics, her departure was also a proxy victory in the escalating ideological battle over American higher education. Gay resigned resigned on Tuesday amid plagiarism accusations and criticism over testimony at a congressional hearing where she was unable to say unequivocally that calls on campus for the genocide of Jews would violate the university’s conduct policy. Taking down Gay was a “a huge scalp” in the...