That isn't specific to TERF, people just like to throw around insults like that and use them as a basis of their argument these days. You just notice it in this

That isn't specific to TERF, people just like to throw around insults like that and use them as a basis of their argument these days. You just notice it in this case because it's an acronym that defines itself. It's like incel or nazi/fascist, most people being called those things aren't actually celibate or nazis.