Sometimes an article sums it up just right.
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I once heard a story told of Ravi Zacharias, where he was being driven around a campus where he was to speak, and in the course of the tour they went by the art museum. This museum was designed as an attempt to match the same kind of nihilism that they would hang on the walls inside — doors that didn’t open, staircases that didn’t reach the top, columns that didn’t go all the way — I don’t know the particulars, but that kind of dada stuff. Zacharias made a comment that went right to the heart of matter when he said, “I’ll bet they didn’t do the foundation like that.”
Van Til once observed that unbelieving thought has to oscillate between rationalism and irrationalism, and the inconsistency that Zacharias pointed to is an example of that. In the political realm, they usually manage the oscillation frequency by being irrational when it comes to the demands of their own lusts (personal choice must rule), and rational when they demand that Christians play by “the rules” (we must live in community). In short, we are called upon to “rationally” support their forays into insanity. We believers earn the capital of cultural rationality, which they get to spend on their various benders.