As long as there are distinguishable races, it will be inevitable. Most people will automatically believe their upbringing is better than others. My school once did a social experiment where there would be a primitive society, and you would be able to give them everyday items in modern society. Most people decided to give them technological advancements that modernized their life, even if the people were opposed to it. It proves that most people will think fondly of their own upbringing, and that their life is superior to others.