I mean, I wouldn't consider him a top authority. It's an overly lawyerly approach to US treatment of groups that are clearly not actually being genocided (presently, native americans were). So I disagree on the same grounds as China, you need some mass casualties at minimum before getting into the legal nitty gritty. Maybe mass sterilization could also suffice.

I actually restrained myself from pointing out that the standards used against China in this thread would fit just fine against US treatment of minorities, it seemed too facile.

Now, western actions in the middle east on the other hand, we have mass casualties so legal arguments are on the table. I wonder if they said anything incensed and dumb that would indicate genocidal intent.