Problem with this excuse for name calling is that many people getting called a terf have never identified as a terf, some not even as a feminist. That’s also ignoring how language especially slang evolves and words can used to mean different things and triggers different emotions. You can call somebody a mom as neutral statement of fact, as an insult or a praise. This excuse is so laughable bad that you need be literally autisic or otherwise have some issues understanding communication to buy it.