To be very brief:
Beehaw seeks primarily to protect its users and create a space where they aren’t going to be attacked for being who they are.
The Beehaw admins noticed they were dealing with a lot of hate from 2 lemmy instances which had open sign ups.
Beehaw defederated from those 2 instances.
There’s been some kickback from people who think defederating goes against the core values of Lemmy.
That’s all I’ve got, I’m sure others will be able to add to this
2 slices toast, buttered, with marmite if I feel like it’s worth the effort