I agree that anyone can have NPD disorder. At first I thought the disorder was just someone who liked to look at themselves in the mirror, to primp and preen themselves. Sort of a harmless individual with an overinflated ego.
I'm no specialist but I think there are varying degrees of NPD, in my case the older my sister has gotton the worse the problem has become. It's true someone with NPD is very clever. Since I have been getting lots of understanding on this disorder it has helped me to see how I have been used by her and my wanting to fix our relationship is very likely not going to happen. With all the pain and heartache that I feel I still want to fix it. Pretty sad, huh?
I don't know if Jim Jones was a narcissist, but he sure was a lot of other things, all bad.