That's an interesting perspective which I had not considered before. There are certainly plenty of people out there desperate to sit in opposition to mainstream culture, not merely to be arbitrarily contrarian, but because they enjoy the feeling of being hated. The fire-hose of scorn and derision maintained by such rote denouncements might attract them to the idea like moths to a flame.
This basically does happen. For it to not happen, people would have to universally be ok with prejudice toward them based on their skin colour, and that's obviously not true. A certain percentage of them will develop more hostile beliefs toward people who they feel are persecuting them.