I think it should be permitted to use the n-word when quoting or retelling, though as with all language norms, common sense applies. Someone who just says, "n*" and claims "I was quoting Pulp Fiction" -- I mean, let's get real.
For instance, there are multiple wonderful Key and Peele sketches that can't be replicated by white people because the jokes depend on the use of the n-word. And we should be encouraging white people to revel in black humor, not segregating.
Note that I do not in any way consider this an injustice; it's more like a laptop that could use another port but is otherwise fine. I do not consider it unfair, an important issue, and certainly nothing that should be a factor in politics. It's a minor annoyance at most.