It is so unbelievable that there are people (even on the Left) who think it’s okay to purposely misgender people! I wrote this: You Call That Radical Feminism? about one of my experiences with a terf.
I had another experience like this with someone I met when our kids were babies. We were becoming close friends, and then she met my trans BFF and flipped out and said the most hateful stuff. The last thing I said to her was that we’re all on our journeys, and if she ever feels ready to learn more about all this or has any questions, she can still come to me.