> Meanwhile the moderators of this site hellban people for the "crime" of linking to a scientific paper that disagrees with global warming
Hellbans are not always moderator implemented. Usually hellbans are the result of people downvoting. Since climate change denialism is usually bullshit I can understand why that kind of link gets many down votes.
The other stuff sounds horrible, and surprising, and I'm sad if your account of it is accurate. For what it's worth I've seen personal attacks heavily downvoted, and I've seen homosexual-positive comments upvoted.