It's tribalism. “If it looks like a person, but it behaves differently from me, then it's an outsider or a defect. Either way, it's bad for the tribe, so get rid of it.” Definitely one of humanity's darkest traits.

[–] FlyingSquid 2 points 3 months ago

I think it goes beyond tribalism. It's about a baseline of normality society has come up with in recent times. People with ADHD and autism weren't treated as complete others before those diagnoses existed. They were considered eccentric, but not considered "different from the in-group."