But that's just the point. The words in question aren't any more charged with racialist intent than would be an equivalent work by the same person in a nonverba

But that's just the point. The words in question aren't any more charged with racialist intent than would be an equivalent work by the same person in a nonverbal medium, but one of those words in particular is linked to a reflex response called "offense", which apparently is so exceptional as to preclude any further analysis whatsoever even in people who don't fall within the group for whom the reflex-trigger word is a slur, and who therefore by definition cannot be insulted by its use. I don't know, maybe it's just me. But when I see a lot of different people who've all apparently been trained to react identically and without thought or consideration to a given set of triggers, regardless of any context in which those triggers occur, it creeps me out just a little.