Im sorry you had to deal with that. I flipped the script on them, support this crap and they are gone, dissowned, refered to as 'the biggot formerly know as <insert name>', I'll talk about them as though they are sub-human, see how they like it.
Some relatives arent invited to my wedding because although I dont like my sil's spouse on a personal level, they are trans, they are invited and they will be protected. I would rather spend time with someone decent who I dont get along with than someone biggoted who I used to get along with.
I hope you are in a good place in life now, stay strong. It will take time but conservatives always lose to the inevitable march of progress. They've been losing, and that is why they are so mad