see linked post. I believe this would count as one of the examples given in the federation policy https://lemm.ee/post/401063 :
An instance which is knowingly spreading CSAM into the federated network
US conservatives used to actively distance themselves from nazis and fascists. That was before the Tea Party, which later morphed into MAGA. When a fascist movement became their key to power, they had to stop repudiating nazis and other fascists and start running interference for them.