Racists hate anything that is different. Racism has a side effect of creating a very closed off gene pool that's sequestered the rest of the population where they don't allow anyone too different to enter into it. In extreme cases this includes mating with siblings or other family members. The genetic traits for predisposition towards racism gets passed to offspring and perhaps even strengthen with each generation, and create an even more sequestered gene pool.

At what point does this sequestered gene pool of racists become so isolated and separate from the rest of humanity that they become some entirely different species that's not homo sapiens?