Being people of science, you have to realize that there are genetic differences between "races" of people, and that these differences are sometimes significant, for specific reasons.
For example, only caucasians can possibly (about 10% of them) stand HIV, which is because of a genetic adaptation from the middle ages, from the black plague
Black people are more adept at long distance running, because of their comparatively stalkier legs and different capacity to store oxygen
Asian people (and white people in northern europe) have rounder skulls, for retaining heat
Caucasians are the most likely to be lactose tolerant, for dietary purposes of having milk-producing cows/buffalo/goats ect. in their surroundings (also middle easterners and east africans)
Redheads need more anasthesia and cannot as easily stop blood loss (blood clots less easily)
Native American infants are on average larger than any other race
Redheads have bones which more easily stand the cold and do not become as brittle in these temperatures
And, lastly, as you can see, these differences all are not only significant, but are either good or bad.
I think that last point will be the one which is most contreversial
But I will say that one of the most annoying things to me is people who have negative feelings because of racial differences between them and others
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