Judge James Ho, who announced he won’t be hiring Yale University law clerks over concerns about free speech at the school, called intolerance for different viewpoints at colleges a “cancer on our culture” and said the goal of his boycott is to “stop the cancellations.”

Ho, of the U.S. Court of Appeals for the Fifth Circuit, spoke at Yale at an event about the state of free speech on campuses hosted by the William F. Buckley Jr. Program alongside Eleventh Circuit Judge Elizabeth Branch. The first federal judge to publicly join Ho’s boycott, Branch also criticized students who disrupt protests.