I can't understand how you can say that when it's transparently false. There's an enormous quantity of research on ethnicity and genetics. Researchers have found all sorts of correlations. Even common sense tells you things about eye color, hair color, etc. but it goes far deeper than that. It's more precise than classic race but both are still valid classifications.

You must also think scientists don't believe in the distinction between planets and dwarf planets, or even stars. Yes it's an arbitrary classification, but it's still useful.

You're thinking is just like the people in TFA. Rejecting some science for arbitrary and nonsensical political reasons. You've replaces dirty Jewish science with dirty racist's science.