Why are people talking about Anti-Rabid Fanbases 2?

haven't got any answers on r/youtube so I thought i'd ask here

ORIGNAL POST & CONTEXT:
https://www.reddit.com/r/youtube/comments/1tli6m1/who_the_hell_are_antirabid_fanbases_2/
https://www.youtube.com/watch?v=HPQe6yYpU3o

I've recently been mass-pinged and noticed comment spam by this decently large group called Anti-Rabid Fanbases 2 linking to this strange video on a channel by the name of Python.5. I can't find much on my own besides a 10-year-old Steam group, a Reddit post about a Google+ group of the same name and some old DeviantArt posts. Can someone explain who they are if you happen to be in the know? I have joined their Discord, and I don't think they're associated with any previous groups I am aware of.

A friend of mine has also alerted me to them raiding Discords and making bait-and-switch servers that look like pre-existing servers like the Furry Nexus on Disboard but redirect to their own.