Do people with narcissistic personality disorder (NPD) know they’re selfish and manipulative? Or, do they think what they’re doing is justified?
Everyone is selfish and manipulative. Everyone.
A newborn baby’s first trick that it learns is that crying brings someone that fixes the bad feelings. It’s in human nature to be manipulative. It’s in human nature to be selfish. What people are doing by putting their needs before others is perfectly justified. That’s why they are called NEEDS.
Where it becomes problematic is when the personality disorder gets in the way of healthy relationships because of a pre-occupation with the self is so large that another person’s needs never enter their minds. They simply do not factor into any equation and that is the dysfunction of a personality disorder as it causes the person to act in every way imaginable with zero regard for the other people affected.
Yes, these people think that what they are doing is justified. They believe everyone thinks like they do so not only can they not understand why you insist on your needs being important but that you have a problem with their needs being taken care of first. Your needs simply are not part of their equation.
