"There is a wide consensus that the racial categories that are common in everyday usage are socially constructed, and that racial groups cannot be biologically defined."[1]
From a genetic perspective there is basically no basis for the traditional categorization of race. Two people of the same skin color, from the same country, who would be considered by traditional definitions to be the same race, can have completely different genetic lineages. There is a National Geographic documentary that discusses this called "The Human Family Tree" that is available on Netflix.
Is it really important to you that race be traced back to genetics?
I mean, is it really important we have this concept?
You realize that your brain is not your skin right? The whole concept of race not existing is that if you look at genetic diversity for markers we can correlate to function, there is no difference between the "races" greater then the difference we find within each population - i.e. the population does not exist, beyond visual cues.
But you know, it's probably really important we be utterly pedantic on this point. Because heaven help us if we don't acknowledge people's skin color can be different in a consistent way. That seems really important and we must mention it a lot. For some reason.
My understanding of the point is that genetics exist, but they rarely map along the lines of what we understand as races. It's an artificial taxonomy which works for a few things (like sickle cell) but from a genetic perspective you could draw the lines many ways.
Wait, is this not generally accepted? (As in, not generally accepted that they are different).