It is called narcisism, where a person does not see anyone else as anything but a cardboard cutout.
Other people are not real to them, we are all here for their specific enjoyment, and if we hurt them in any way shape or form, it is not because they might have done something wrong, it is because we are awful people, and just don't understand them.
They are perfect, and no one can tell them otherwise.
I have known a few sick freaks of this persuasion, a number of them have put a gun to their head and pulled the trigger.
No big loss as far as I am concerned.