I appreciate the example and I think I see your point. I agree with the underlying logic, in general, but applying it to the N in NPD seems an over extension.

Dictionary definitions for the two terms, as records of common usage, are notably different. Autism refers solely to the condition so your example sentence would be an inappropriate use. Acceptable and understandable in the language, but an uncommon application of the word. On the other hand, narcissism is used for general egoism and self importance first and for NPD second.

This of course doesn't invalidate your feelings when hearing the word or desire to protect others from the same, but maybe this can offer some comfort if the most common usage is not intended or even understood as a slur or even a reference to folks with NPD.

[–] Grail@multiverse.soulism.net 1 points 5 hours ago

But if we go even further back in history, to the very origins of the term, it's not good. There's an ancient Greek myth about this teenage boy, Narcissus. He was 16 years old and very beautiful, so everyone wanted to marry him. But he just wanted to be alone in the woods and be a hunter. Bring back food for his community. But every time he returned to civilisation, he was inundated with marriage proposals. And he was just a boy. So he loses his temper and tells one of the people sexually harassing him, Ameinias, to go kill himself. Ameinias actually does if, because he's genuinely obsessed with Narcissus, and as he does it, he prays to the goddess Nemesis for revenge. So Nemesis curses Narcissus to be capable of beholding his own beauty. Next time the kid comes across a pond, he sees his reflection in it, becomes obsessed with staring at himself, and dies of thirst because he can't tend to his basic needs.

So this is an aro/ace child in an aphobic society who was sexually harassed, lost his temper, and sentenced to death by a god.

A lot of people perceive Narcissus as some kind of abuser, and I think these readings of the myth come from just how aphobic Greek society was at the time. They thought if you're pretty, then you owe people sex, and if you don't want to have sex, then you're stuck up and full of yourself. It's disgusting. And I'm not comfortable with the way our society has spent 3000 years mocking a queer child. Even a fictional one.

So no, I'm not going to become okay with hearing the word used as an insult. I've genuinely done a lot of research on this issue and I'm convinced it's bad. As an asexual, I relate to Narcissus. As someone who suffered child abuse and now has a harmful relationship with My self-image, I relate to Narcissus. Our society hates people like him and people like Me because its values are all twisted up, same as the ancient Greeks.