axiomatically presupposes human supremacy

not very hard to do. All it requires is a factor that excludes almost all animals and voila. For example: only being capable of communicating abstract concepts (for example: crafting) should be afforded these rights. Since the list of animals we have observed that in is also pretty much the list of animals we don’t eat there is no moral dilemma anymore.

Granted I’m an unapologetic human supremacist so this is a biased take but concluding some sort of human supremacy in the animal kingdom is not hard given that we pretty much rule earth. There is undeniable proof that by simply being present humans influence biospheres harder than an apex predator suddenly showing up, so we have some form of elevation above other animals pretty much proven (whether that influence is “good” is another discussion). All that’s needed then is to find anything that separates humans from animals and you have your human supremacist theory. Given our rather distinct evolutionary path that is not really a difficult exercise.

Without deeper thought I agree with the rest of your statement though.