What's stopping me from identifying variation in the frequency of different traits between ethnic groups in the current day? It's not a virtue to pretend not to notice such things (or, indeed, to be truly incapable of the most basic pattern recognition).
I think the argument could then be made that if you identify traits common to closely related tribes (eg. indigenous East African) that are noticeably different from the frequency or magnitude of these traits in a different cluster of closely related tribes (eg. indigenous Scandinavian) then there should be no reason to pretend to ignore them.
What's stopping me from identifying variation in the frequency of different traits between ethnic groups in the current day? It's not a virtue to pretend not to notice such things (or, indeed, to be truly incapable of the most basic pattern recognition).
I think the argument could then be made that if you identify traits common to closely related tribes (eg. indigenous East African) that are noticeably different from the frequency or magnitude of these traits in a different cluster of closely related tribes (eg. indigenous Scandinavian) then there should be no reason to pretend to ignore them.