Talking about the antisemitism at Durban without reference to post-colonialist ideology was like talking about the attacks of September 11th without reference to extreme Islamist ideology. We should have grasped the underlying problem then: “It’s the ideology, stupid.” Fast-forward twenty years, and we see the same political dynamic—not in a remote international conference of NGOs and diplomats, but in multiple mainstream American institutions, including higher education, K–12 schools, corporations, the law, medicine, nonprofits, and even scientific research.

