You mean, they don't create fictional 'races' of bluebirds and then spread hate about each other, including by asserting it's somehow inevitable? Oh, to be a bluebird rather than a Hacker News reader today.

Bluebirds tend to prefer the company of other bluebirds.

Lions prefer lions. Hyenas prefer hyenas. They coexist. But they prefer the company of their own. And that's ok. It is nature.

No need to add complexity. It's nature. Always has been. Always will be.