To me this is just proof of how effective evolution is. Here we are, a group of people who have largely never met, who have collectively decided to shun him from our social structure.
Ponder that for a moment. Humans have a lot of compassion, but even across this diverse group we know bad genes and who needs to be shut out of the social/economic/courtship process.
That's huge to me. It makes me think nature has shaped us even better than you'd think.