He’s playing word games. Whether you call it race or something else, and regardless of how strictly defined the borders of these human population groups are, they exist and they are genetically distinct from each other. AI can accurately identify a person’s “race” just by looking at an xray of their skeleton.

He’s not entirely wrong. Race is an imperfect social construct used to describe actual physical/genetic differences between human population groups that evolved separately for tens, and possibly hundreds of thousands of years.

You could also argue the term species is a social construct and point out the borders between them can be fuzzy, and yet most people would agree species exist.