When I see people type up "RTs are not necessarily endorsements," I wonder at our species and our inability to compartmentalize.
I read H.P. Lovecraft even though the guy was a massive swine. Don't really see the issue. Certainly never took his opinions on race seriously.
Conversation
The issue with filter bubbles isn't so much all the nepotism, which is just primate stuff, as the complete blinkering and narrowing of all perspectives.
And that is much more of a cultural problem than a genetic problem.