Looking at various breeds of dogs, one notices that certain breeds have genetic predispositions to certain behaviors. The average golden retriever does not behave the same as the average pit bull. This does not mean that there are not aggressive retrievers or docile affectionate pit bulls, but average behavior is something people take into consideration.
The politically-correct meme is that the only difference between races is outward appearance, and there is no correlation with average testosterone levels or other internal characteristics which might affect outward behavior.
Oh, come on now. You must know that genetic predispositions only apply to animals, not to humans.