The right-wing media is obsessed with the supposed stifling of “free speech” on college campuses, but it seems to care only about protecting speech it likes. When progressives make provocative statements, conservative pundits react with wounded outrage. This double standard is especially striking in the internet era, as the negative coverage of progressives leads to unbelievable harassment of both professors and students.

Last May, after a video of a commencement address I delivered at Hampshire College circulated on the internet, Fox News created a segment out of the 30 seconds or so in which I called President Trump a “racist, sexist megalomaniac.” The network ran the clip repeatedly over four days with the headline “Princeton professor goes on anti-Potus tirade.”

That a junior faculty member of Princeton was critical of Mr. Trump in a speech at a small liberal arts college should not be surprising. Nor was it newsworthy in any meaningful sense of the term. But it did incite Fox viewers.

Within hours, invective filled my inbox. I received emails that promised I would be lynched, shot and raped, and Princeton’s department of African-American studies, of which I am a member, was so flooded with hate that the locks on the doors had to be changed.