its literally just straight demonizing a disorder. its the exact same thing as stereotyping autism or BPD, its abliest and just rude. its not real and not every person with NPD is an abuser : coming from someone with NPD !!! it is not ( and never is ) the disorder! its the persons problem!! not all narcissists are abusers and not all abusers are narcissists. if someone blames their abuse on the disorder or in tandem blames their abuser for having their disorder they're not educated enough on the disorder and are pointing fingers at the wrong thing. people with BPD/NPD/ASPD etc etc CAN have good relationships. people with those diagnoses can and ARE good people.

as said before its not the disorder that makes the person evil, its the person themselves that chooses to go down that path.
hope this doesnt sound too rambled