A lot of this is just personal observations, but it appears that race is becoming more and more of a social construct. Rachel Dolezal is just one obvious example of somebody choosing what race they belong to, and I have no problem with her identifying as non white, and in fact prefer she continues to do so. It seems though that people are identifying as white when they feel they are intelligent. Be around a group of black adolescents much and you will see them rag their smart friend with being white, because he like to stay on top of his school work. Eventually this kid starts adhering to white culture. At first it may just start with him eating mayonnaise, but then he starts watching comic book movies or playing Pokemon card games, maybe he marries a white woman, goes to a white church and eventually obtains a good credit score.
On the other hand, if you are around enough white youth, you will see people like Rachel Dolezal are pretty common. A white young man may start to wear his pants in a way that exposes his rear end. Perhaps he will listen to rap, and involve his self in hoodlum behavior. He will consider himself black. He may grow up to marry a black woman, have black kids and engage in other activities his shallow view of blackness decides is appropriate such as playing dice games or whatever black persons do.
As this self selecting continues, with the dumb whites identifying as black and the smart black continuing to identify as white, the differences between the races will grow. It's not just smart blacks identifying as whites. A lot of Asians are doing it as well. Many hispanics who view themselves as too smart for their race identify as white now, such as Ted Cruz. Anyone who is following smart Jewish people on Twitter, like I am will see many of them start to claim to be white because they are ashamed of their race. (true some of them claim to be white as an excuse to bash white people while having a white pass, but it is not universally true).
This is obviously good for the white race. The white race is made stronger through poaching the best of every other race. It prevents a problem though. How does the world respond to the fact that after this divide is so big enough it will be undeniable that the white race is superior to all other races. (superior in terms of adaptation to "the machine of industrial society" not actual superiority).
How should the world respond to a race living side by side to other races clearly inferior, and no longer close enough to even be deniable?