Narcissistic personality disorder[0] is unnoticeable for a person having it, but makes lives of all around them a living hell. Such person is always right, and the 99.99% people around with an opposite opinion/viewpoint are idiots. If some "idiot" is standing up, there comes the retaliation part.

[0] https://en.wikipedia.org/wiki/Narcissistic_personality_disor...