You are only speaking in half truths, yes there are subsets of whites, but there aren't really all that much of them really, you claim Americans are all inbred whites? That's quite misleading there. There isn't a genetic difference between a natural Austrian, German Dane or a true white American of the same ancestry. There is a genetic difference between a native Russian and a Brit Bong.
White subsets of the modern age (some are so mixed like French and Spannish that they no longer carry a majority of one racial subset):
Slavic, Nordic/Germanic(same fucking thing), Roman(ancient roman whites, not mulattoes/gypsies of today) and Indo-european (whites form the ancient middle east/India)
You would be supprised how many relatively pure Americans there actually are, compared to those in some European countries, such as France, Spain, Portugal, hell maybe even Brittanistan. The only problem is that there are so many fucking shitskins in our country AND muts/race mixers that it can be hard to differentiate, and there definitely is a problem with people claiming to be white, when they really shouldn't be. White/caucasion needs to be removed and changed into many differen't categories, but that would be pollitically incorrect :^). The problem are white mixed hispanics claiming to be white, half-asians claiming to be white, gypsies, half-arabs, kikes, etc..
What we currently call white today, SHOULD be called Northwestern European, Germanic, Nordic, hell even a small amount of true Anglo-saxon etc.. We are all of the same blood. Our ancestors didn't call one nation home and we shouldn't be infighting about it today. Honestly we are probably the least prone to breeding outside of our own racial lines. A mixed Slavic-Nord? that's what you call white. However a mixed Scottish-Danish-German American? Still Nordic as far as I'm concerend. Scottish blood maybe watered down, but it is still Nordic.
Instead of just white/caucasion, there needs to be more subsets and mixed categories for those fucking claiming to be white. If you don't have a majoirty of one type of blood, you can't claim to be of any nationality imo.