The college president canceled it himself.

The Washington Post reports.

Williams College cancels a speaker who was invited to bring in provocative opinions

Williams College’s president took “the extraordinary step” this week of canceling the speech of an author who had been invited to bring provocative ideas to campus, saying his ideas cross the line into hate speech.

John Derbyshire, a mathematician who used to write for the National Review until he wrote a piece for a blog which was widely decried as racist, had been invited by a student group to speak about immigration and national identity.

The group, called “Uncomfortable Learning,” was formed three years ago to bring provocative, challenging, outside-of-the-mainstream ideas to campus.

This one went too far, Williams College President Adam Falk decided.

It was the second speaker in the series to be un-invited to the elite liberal-arts college in western Massachusetts. It was another sign of the delicate balance university leaders seek between protecting free speech and ensuring that people on campus are not subjected to hate speech or a hostile climate.