My assessment of the political demographic which identifies as 'liberal' and 'progressive':
It, in general, has to be one of the weakest-minded, most arrogant, obnoxious, callous and downright repulsive groups I have ever stumbled across. They are leftists, most of the time. Victims of cunning and subversive brainwashing. I have not encountered any one of them whom I would consider a tactical thinker. Why should non-tacticians be listened to or allowed to control vital entities and infrastructure?
Nearly all of them are utterly incapable of forming reasoned arguments or counter-arguments, or using critical thinking skills or imagination, preferring instead to resort to petulant abuse (usually involving shouting derogatory labels they do not understand), spontaneous accusations of advocating atrocities, pathetic platitudes and misrepresentation of opposing stances. It seems that a great deal of them have attitudes similar to teenagers who have grievances with authority and are angry with the harsh technicalities and realities of the world, which leads me to believe they are products of poor parenting, deprived of discipline and exposure to refined ways of life. Consistent patterns of narcissistic behaviour (branding themselves as "progressive", baseless assertions of having superior qualities, inability to accept flaws in their logic / reasoning, etc) are rife.
Substance abuse among them, particularly involving types that cause cognitive damage, is also highly prevalent, which also explains a great deal.