The distillation process has worked to move the people we're talking about from revolutionary action to revolutionary passion, to merely passion. They have incredible material possessions, they have given up God, and there is a void that they must fill with passion. And passion directed by the cynical is a powerful weapon.
It tends to be a little hard on the passionate, however, and they tend to be resentful if they ever do figure out that they've been used. But the thrust of the article is toward the failure of intellect, and that is precisely what happens when passion rules.
These aren't liberals, not really, not anymore by whatever criterion we use for that nebulous term, and the current fashion of relabeling them as "progressives" serves only to illustrate the point. Progress, toward what? Well, toward everyone feeling good. And death to anyone who makes them feel bad. That may be a lot of things, but intellect it is not.
Don’t forget - the “Progressive” movement of the early 20th century gave us Prohibition and Income Tax.