The instance seems to be mostly right wing trolls. I know defederating is unpopular but I don’t think much is to be lost in this case and it can save the mods some headaches.
Edit: the response on exploding-heads.com to my reporting of transphobia. Courtesy of the “second in command”
While I don’t dispute your broader point that people can have some rather broadly-ranging views on what constitutes fascism, I do wonder if that specific user might be trolling.