I was there, I saw the thread. @TheDude, did you? It was pretty strongly in favour. Do we really need to keep waiting around to see if an instance administrated by a guy who wants to declare “cis” a slur is going to turn out okay?
https://sh.itjust.works/post/216888 for context.
Just block the community and the TWO SOLE USERS dude-person. It’s not hard. Two people are not going to “create a genocide against trans folk”. You and OP are overreacting. Use the tools you have available.