Race is defined by ancestry inferred from genomic similarity or phenetics. This is a simple and unassailable definition and all of your attacks on the concept are strawmen or non-sequitur. Your non-sequitur assertion that is has no utility is simply false. The simple informativity of the statement "he looks Chinese" shows what nonsense it is, let alone myriad other predictions. It's quite easy to debunk reality deniers, they rely on the same cheap category fallacies. Boas started the ball rolling with his "heads change shape" cherry picking fraud study nonsense. Doubtless you agree with that.