Reactionaries repeat that over and over, which is their most common tactic for any issue. But reptition is not truth, as we have learned well in the Internet age, though that hasn't stopped people from repeating it. Also, the reactionaries main objection seems to be that their own ideology isn't taught (including things like denial of climate change and racism); they insist they are a non-ideological norm and everything else is ideology, again through repetition. Academia requires proof; it's not a place of equity for bad ideas. It's also a place that disrespects the current establishment; again, no ideas get special treatment.