

This sounds like psychopathy (also a trait of borderline and narcissism, although there’s an argument to be made that psychopaths are distinct from those).
I wouldn’t expect a logic based rebuttal to work - all of these conditions are essentially emotional in nature, compensating for a negative past (shame) or compensating for a negative future (generalised anxiety).
This compensation is specifically grandiosity - a cognitive distortion to set themselves up as superior in their own minds, such that they no longer need to be ashamed or anxious.
Contempt is a manifestation of grandiosity, or more precisely a reaction to shame, transforming the realisation of their perceived inferiority in the past or future into the delusion of superiority.






Yes, psychology, specifically cluster b personality disorders - although it’s much more nuanced and complicated than what I’ve described, especially as conditions often transform and metastasize over time. For example, the borderline can take on a narcissistic persona when challenged and would be diagnosed as such in that self-state.
It’s quite difficult to find reliable sources of information online, as narcissism and psychopathy are popular subjects these days - ironically attracting narcissists and psychopaths to the production of content relating to it (for views or money).