Because your average lemming is a wingnut who thinks anyone to the right of Stalin is a fascist.

Where/how is this obtained?

I’m curious about seeing an entire list of defederated instances.

fba.ryona.agency

Be aware that it doesn’t track when lemmy instances defederate from other fediverse instances correctly and hasn’t for months, and that it’s run someone from one of those 50 defederated instances.