Sure, but that still doesn’t make them a friend, or even an ally. They still hate you too, you just have opportunities to play them against each other.
When my stronger enemy tries to destroy my weaker enemy, I side with my weaker enemy to prevent the stronger from becoming unstoppable.
and I don’t think he’s a classic TERF right now either
The thing is, TERF can be a gateway drug to more reasonable positions. By repudiating them and anathematizing them, you may make yourself feel good, but it's not doing much good in the outside world.
The comparison doesn't really hold water, because both are basically non-entities.
Now imagine a world in which both are immensely powerful, more powerful than you faction, but they also fight each other.
What is the way you can best take advantage of that?
When my stronger enemy tries to destroy my weaker enemy, I side with my weaker enemy to prevent the stronger from becoming unstoppable.
The thing is, TERF can be a gateway drug to more reasonable positions. By repudiating them and anathematizing them, you may make yourself feel good, but it's not doing much good in the outside world.