There's been an undercurrent of this among TERF forums. In many ways, they're leftover second wave feminists who didn't get on board with the intersectionality that's central to third wave feminism. They tend to drag other things from 1960s/70s feminism along with them, like prattling on about the Earth Mother and healing crystals.
One of the criticisms the third wave had of the second is that the sex negativity tended to align them with far right religious conservatives on many issues. That's a good indication that something went wrong. Maybe it's no surprise they ended up in MAGA.