No, Homo Sapiens is a species. There are multiple races, that is, various biological adaptations to different environments etc. Claiming anything else is just ideological indoctrination, no matter if you claim that there's only one race, or that some race is worth more than others.
There's plenty of evidence for it, like how some races are more or less susceptible to certain health issues, like say being less likely to suffer from Malaria but instead having an 8 times higher risk of contracting diabetes. Or, for another race, increased susceptibility to Malaria and more likely to suffer from clinical depression, but less susceptible to diabetes. There is plenty of biological evidence that proves your ideological imperative wrong.
As for your statement regarding breeding, you clearly show that you are quite ignorant about biology: Races can interbreed and produce viable offspring. Hell, in some families, you can even have cross-species breeding, though the offspring becomes either completely(Liger, male Mules), or mostly sterile(female mules).