This gives white supremacists far too much credit. It's more like everyone at the bottom is white, but the last two test as 10% sub-Saharan African on ancestry.com. White genocide is inevitable when you also apply the one-drop rule to disqualify people from being white, which they do, because it's virtually impossible to have successive generations keep avoiding people who are at least 0.000000001% not white. Eventually, every European outside of people living in isolated villages located at the heart of the Alps would have at least some form of non-European ancestry.