Once Nana got rich, he fiercely rebelled and tried to distance himself from his niggerish roots by becoming what he thought was the antithesis of a nigger, but what he failed to grasp was that everything he did was perfectly in his niggerish character, as he simply doesn't know any better. The garish house, the retarded cars, blowing money in AC, the gay pool parties...the definition of nigger rich.
At the same time, he was becoming internet radicalized, going out of his way to smother his niggerish impulses by gravitating toward hardcore right-wing survivalist Nazi-type shit, shit he used to rationalize his desperate attempts to hide and/or get past his niggerish upbringing. Similar to how he uses pedophilia to disguise his homosexual urges, Nana began citing facts and anecdotes to "prove" how much he hates niggers, when what he actually hates is himself.
In fact, I have to wonder if his Times Square encounter ever even happened. It would be totally in character for Nana to create a fictional scenario where he could express his hatred for niggers, and by extension himself, so he could go off on a rant that would forever tag him as a nigger-hater, in a desperate attempt to finally distance himself from the niggerish upbringing that continues to haunt him. No one ever came forward, no one witnessed it, no one ever tried to cash in on it, the only evidence is one pic of an angry negress (dime a dozen). Nana was so desperate to escape his niggerish heritage that he was willing to torpedo his career in order to do it.
And it isn't to suggest that he doesn't legitimately hate niggers, as who doesn't? But deep down it's less about them and more about himself. They're just an easy target where he can unload his intense self-loathing. He even studiously avoids daylight and dresses as un-niggerish as possible in an attempt to "whiten" himself, so desperate is he to shed his inner nigger-ism. It's why he drinks so much...he wants to forget how he was raised as a nigger.