Again, I refer to 'Pulp Fiction' and the like...
I'm not arguing for censorship regardless of context, but what to you is 'the right context'? Here you've justified its use because it's 'part of a classic'?...
I was specifically thinking of the line spoken after Bruce Willis fails to throw a fight and then runs off with the cash. The character Mesalis says (paraphrasing) if he goes to Indochina I want a N... waiting at the bottom of a rice bowl.
Of course the line was spoken by a black man but supposedly written by Tarantino, he got full credit & an Oscar for it. So the line is his responsibility and it worked no other would've worked as well.
So that's what I meant by 'context'.
Good question, though.