I agree with you on that, actually. “Biological” race comes apart rather quickly if you examine it all critically or scientifically; why were Prussians considered “pure German” when many of them had a heavy Slavic intermixture, how did Italian-Americans “become” white, etc. My point was more: even if you accept (for the sake of argument) the fascist conception of what race is, it still is not nation-building. Which makes the entire fascist conception of the nation essentially contradictory.