My older son discovered it when researching liberalism as a mental illness.
Thanks to your older son for the research. My logical mind tells me that “something” is lacking in those who espouse liberal thinking. Logic dictates causes and effects and believing something that is not logical indicates a loss of mental capacities.
But don’t quote me. I don’t want to be known in the annals of History as The One Who Got It Right. It may be WRONG!