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There is really no such thing as "white", though. We are heavily inbred.
Everyone has at least 2 percent Neanderthal DNA; At least. They found this out when they mapped the genomes. Its why many of the Northern Europeans came to resist pathogens in that area, because they were infused with the beneficial Neanderthal DNA.
The bad stuff we got, in that pathogen resistant mix, is hay fever and allergies to cats/animal fur.
So when you think about racial purity, remember that "caveman" Neanderthal DNA you have; Its farther removed from you than African Americans/Jews/Any other people group currently alive.
Your ancestors inbred with this guy:
To the tune of at least 2 percent of any of your/our DNA.