The N word was invented by American pro-white hate groups as a dehumanizing term for blacks, so if a white person uses that word, it would be understandable for a black person to assume that said white person sympathizes with those groups. Sure, racial wounds heal over time, but the state effectively assisted those groups in persecuting blacks as recently as fifty years ago; the Holocaust is almost twenty years older.
Also, is there anyone who slams on the world of right wing punditry like this who has any direct experience with it at all, other than brief clips of Fox News carefully selected by The Daily Show? Because I've never met them.