Last week, Brandeis revoked an invitation it had offered to Ayaan Hirsi Ali, the Somali-born feminist and political essayist, to attend the university's commencement ceremonies, where she had been scheduled to speak and receive an honorary degree. Hirsi Ali has spent much of the last decade denouncing not just Islamist fundamentalism but Islam generally (she has described the religion as a "destructive, nihilistic cult of death"), and once Brandeis's Muslim Students Association and many others objected to her appearance, the university pretty hastily revoked her invitation. Conservatives have since denounced Brandeis for suppressing free speech, and liberals have, somewhat more...