Examples, please, of books that investigate socioeconomic status & race that have not been called racist? Because I can't think of any. By the way, I'm not talking about literary explorations of race like "Huckleberry Finn". Although that was called racist too.
There are orders of magnitude more genetic [...] diversity among each race than there are between the races.
Hold it right there, buddy. License, registration, and sources please. Mostly sources.