The last forty years the world, by which I mean American society and culture, has pretty undisputedly moved left. If we look at the etymological roots of the words of progressivism and fundamentalism or conservatism, the question is begged: Fundamentals and origins are opposed to progress and progressivism.
So we have, if not a compelling and instantaneous event, a divergence wherein the river splits in two and slowly over time runs farther and farther apart. That river is objective truth.
To answer your question, the liberal version of unreality, IMO, is the reality in which liberals today celebrate as norming, if not normative.
That's all pretty straightforward but what throws the monkey wrench in the whole works is when you get down to the business of defining (subjective, you called it) what progress is good and what is bad, because that is where the blood gets spilled and the hay gets made.