The thread is a bit of a dumpster fire…
I’ve been mulling over your actual question a bit. I could argue that some of the stigmatisation could just be that it’s really easy to dislike someone who’s self centred or selfish, that NPD can present similarly (gross assumptions on my part there, sorry) makes it easy to dislike someone with NPD.
Disliking someone makes it very easy to stigmatise any and all of their traits. It becomes a feedback loop.
Anyway, I hope you manage it well and hope you can surround yourself with supportive people.
A subtlety lost on many.
Voldemort was a great wizard.