Races are varieties or subspecies. All species that exist, not just humans, first arose as small, barely noticeable, variations or races branching off from their parent species. Eventually these differences increased and behavioral, morphological, psychological, or geographic separation caused the races to take divergent evolutionary paths. Eventually the differences grew to the point that a new species was born.
Evolution is impossible without this process. Therefore, it is true to say that none of us would be here, and there would be no human beings whatsoever, if it were not for an endless succession of racial divergence and separation events.
Therefore racial separation is not only NOT evil, it is essential, even sacred.
