Rethinking the Language of “Narcissistic Abuse”: Why the Words We Use Matter - Lived Experience Educator
(www.livedexperienceeducator.com)
ND's aren't considered superpowered alien beings and they are disabled--as far as they are--by using other people to meet their own emotional needs.
One common trait of autism is a high value on rules and truth, rules which would be violating by making constant ad hoc exceptions that suit us emotionally.
Further, ND is "bad" in the sense that is the result of damage done during childhood that interferes with the full expression of human relationship. Autism is just a different way of being whose only harm derives exactly from being different in a socially competitive species.
I really don't see the logical connection between the two.