Let us stipulate that ESPN, as a private institution, was entirely within its rights to have sacked Curt Schilling for his combative Facebook post on the continuing national saga that is North Carolina restrooms. Let’s stipulate too that the way the former Red Sox pitcher advanced his case—sharing a meme featuring a grotesque fat man in a blonde wig pretending to be a woman—was not the line of argument that, say, William F. Buckley would have chosen.

But let us also note the irony. Mr. Schilling’s main contention—“a man is...