jkaufman,

• Justifying violence against an oppressed group, on the basis of some unobserved and ambiguous quality, is the definition of bigotry.

• Have you interacted with a disabled human before? What it is it about them that you think merits less consideration? My best friend growing up was differently abled, at the cognitive capacity of a young child. But he is also probably the most praiseworthy individual I have ever met. Generous to a fault, forgiving even of those who had mistreated him (and there were many of those), and completely lacking in artifice. A world filled with animals such as he would be a good world indeed. So why should he receive any fewer rights than you or I? What is this amorphous quality that he is missing?

• Factually, it is not true that human inequality is "socially destructive." Human civilization has thrived for 10,000 years despite horrific caste systems. And even just a generation prior, disabled humans were systematically mistreated as our moral inferiors. Even lions of the left like Arthur Miller had no qualms about locking up their disabled children and throwing away the key.

Inequality is a terrible thing, if you are on the wrong side of the hierarchy. But there is nothing intrinsically destabilizing about bigotry. Far from it, prejudice against "outsiders" is our natural state.