The real question is, does liberalism cause mental illness, or does mental illness leads to liberalism.

The real answer is a bit more complex. Liberalism attracts people who are highly insecure, have very little self confidence and have no self love. Everything these people do is to cover their insecurities and to project outward confidence.

Liberalism provides an easy way of feeling great with only tokenisms. Scream for the rights of "women's choice" - and it makes them feel like a saint. Scream against gun rights and it makes them feel like a warrior. Liberalism builds layer and layer of false identity over a person, to the point where they themselves cannot distinguish between their real identity and their false persona.

This leads to more and more disconnect between reality and the delusion they live in, and that is what causes mental illnesses.