Nearly two weeks ago, Columbia University president Minouche Shafik assured members of Congress that an anti-Semitic professor had been terminated. That professor, Mohamed Abdou, was "grading his students' papers" before the end of the semester and would "never teach at Columbia again," Shafik said. Instead, Abdou—a self-described "Muslim anarchist" who teaches a class on "Decolonial-Queerness & Abolition"—has been a regular presence in the unsanctioned "Gaza Solidarity" tent encampment that has plagued Columbia since student protesters constructed it on the day of Shafik's testimony. The Washington Free Beacon has spotted him daily—talking to student leaders, lounging in the sun, and participating...