The people screaming about free speech for bigots & fascists seem to neglect the free speech of the instance owners and admins.
They're doing this out of the kindness of their hearts. Paying for bandwidth and servers. Donating their time to create the software, work out the kinks, and moderate the communities so we don't strangle each other.
From their perspective: Would you want to use your money and time to rebroadcast Nazism or similarly toxic ideology? Because that's what they're being asked, and most of them say "HELL NO!" When the chuds are demanding that these people rebroadcast such crap, it's like they're asking these admins to do a Hitler salute with them.
This is their space. They have free speech rights too. That's what curation is, free speech. You send a message by the choice of messages you rebroadcast or refuse to rebroadcast.
A long time ago I read some cyberpunk novel, and one of the characters had an ocular implant that got infected with malware that flashed spam ads for Indian brothels in his vision 24/7, even with his eyes closed, until he went completely postal.