Students are demanding that Yale University fire two administrators who failed to speak out against offensive Halloween costumes. This is just one of the grievances of activist students—many of them people of color—who claim Yale is not a safe space for them.

On Thursday, the students surrounded Yale College Dean Jonathan Holloway—a black man—in an outdoor space and chided him for failing to take action against a fraternity that had allegedly prevented black women from attending its party. (It’s not at all clear the allegation is true, according to The Daily Beast.)

After giving Holloway his comeuppance, they moved on to Nicholas Christakis, master of Silliman College. What was Christakis’s crime? His wife, an early childhood educator, had responded to a campus-wide email about offensive Halloween costumes by opining that it was inappropriate for the college to tell students how to dress.