It appears it was because of misoginy and queerphobia.
On this post (beehaw.org/post/561345), they were advocating for women to be treated as inferiors based on the story of Adam and Eve.
On this post (beehaw.org/post/562870), they were advocating for people to stop celebrating pride, compared gay people to murderers and thiefs and advancing the idea of a bigoted “silent majority”.
Looking at their newer posts on kbin, I think this was the right call.