It doesn’t take a study by a rocket surgeon to know the left is crazy. It is biblical: The evil within makes them unable to hear the truth. They are so emotionally attached to their beliefs that that actual truth makes their heads explode.
What you are describing is called “reprobation”; it is spiritual psychopathy: the clinical description is found in Rom. 1:18-32.
The only way to protect one’s self is to avoid those who manifest this pathology.