Are there issue with some DEI initiatives? Yes, but they are often minor, and usually due to bureaucratic laziness, not malice against conservatives or white people.
He is butt hurt that reality has a liberal bias, and wants academia to subscribe to his knee-jerk conservative fantasies instead.
He essentially trying to argue that a completely straight, cis, white, male faculty and student body would still be "diverse" because some were poor/rich, some were rural/urban, and some were old/young. Sorry, that's not diversity, it's simply variations on a theme.