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Genetically, "races" don't exist; discrimination based on what you want to call ethnicity is exactly the problem

Different indigenous people can share almost the same blood but have vastly different ethnicities, because ethnicity is cultural. Check your history.

I'm a little unclear on what you are trying to say. Your first clause rephrases part of what I said.

Is it ok to prejudicially discriminate against someone because of your opinion of their culture?