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.