Jews and NPD? There is definitely a connection here. I remember there was a study on brain difference and Jewish people had disproportionate numbers (good luck finding that). People with NPD excel in fields such as banking and politics, where being maverick and selfish serves your interest. Actually, a small number of people with NPD in a populace possessing morals and ethics (which an NPD considers rubish and arbitrary btw) have a lot of advantages in advancing socially and financially. They are literally predators among prey. 