Instead I'll go for the route of scientific analogy. If dogs have races, why wouldn't humans? After all, humans are not biologically above or separate from animals. Why would basic evolution stop applying with humans?
Mind you, the existence of races doesn't have to imply inferiority or superiority between them. People seem to be afraid that would happen, so they throw the baby out with the bathwater by denying the whole concept of race altogether. Much like the article says.