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"
Seems a lot of people here would burn all of the witches so long as that ensured that they burned the correct witches.
I haven't seen one person post a link to a post or comment that would justify de-federation. Instead they're setting up nice strawmen with nazi hats and then attacking them ruthlessly.
But the idea of ruthlessly filtering people out of your sight if they disagree with you rather than engaging in conversation is endemic. These people have zero interest in being challenged in any way, it's easier to press block or press the downvote button than it is to reply. The OP wants to cut off an entire instance because that's easier for their existence.
They feel like they're doing the right thing... but you can't convince them otherwise because they won't engage in any kind of debate. If you disagree with them they'll just label you as a bad person (OP suggested that someone, who disagreed with them, should go make an account on EH "because you sound like you belong there") and put you outside of their filter bubble.
Or, to Godwin this entire thing, you know there was another group of people who decided to label an entire group of people as a problem and to cut them out of society...