To be fair, the only women so far that have fallen to their knees at the sight of the MC just because he's white was Karla and the black woman you can slap at the gym. Even then, the black woman only really fell to her knees and started to get the tingle in the beanle was because she got dominated it seemed. Less so because of the MC being white. The other girls so far seem more attracted to the MC (besides Karla ofc) is because of his alpha male mentality, less about his race (so far).
The MC, his father, Karla, and her mother so far seem to have been the only ones that are perpetuating the "bleached/Queen of Hearts" kink mindset. It's been a while since I've played the AVN though so I could be remembering incorrectly on some details. And of course this is quite possibly going to change as the AVN furthers along and starts sleeping with other girls besides Karla.
So far, I'm finding this AVN to be just another harem/polygamous(not polyarmorous) AVN. Most harem AVNs have LIs of different races and ethnicities to spice things up and for variety.