I know that ---- but saying there isn't such a thing as "white" would mean you'll have to tell the blacks there isn't such a thing as "black" and the hispanics that there isn't such a thing as "hispanics". It's all just a spectrum, but the blonder more north European end of that spectrum is going to fade away. It was just a mutation anyway and not all mutant strains survive.
Maybe cloning will save "Whites" from extinction. The governments could mass produce and raise children, as in Brave New World.