Incidentally, I agree that it's deeply wrong to ban controversial speakers from universities. All universities.

People like Charles Murray should be allowed to speak. The best way to deal with them is to set up a separate counter-seminar, at the same time and with the same level of publicity, where their ideas are rebutted intelligently by qualified speakers. The only solution to fake news, even loud, sensationalistic news, is to raise the standard of discussion, and to raise people's expectations about speakers' level of intellect and expertise.