I believe when others talk about NPD it becomes such a diluted discussion that it is very hard for people to truly understand. So many have been hurt by ones like me that the descriptions become attacking and misleading other than factional. It's easy to see, just look up NPD and you get all the NPD scholars with their points that are from a place of hurt rather than facts.
A great quote I have used many times here:

NPD is one of the few conditions where the patient is left alone and everyone else is treated. Very true!!!