Peterson has been talking about this trend and diagnosing it in academia for a long while. I’ve listened to many of his discussions and lectures and while he often takes postmodernist doctrine to its logical and absurd ends I doubt he thought he’d ever see them go after something like mathematics.
You’ll also notice this professor is not a mathematics professor but a math education professor. She’s someone who teaches educators how math should be taught. These are the fields the postmodernist / neo-marxists gravitate to. From these positions they wield influence, gatekeeping power and pursue these posts like any authoritarian would.. They are put in these positions for a purpose.