Walter Russell Mead picks up on a highly-significant political pattern:

What liberals are struggling to come to grips with today is the enormous gap between the dominant ideas and discourse in the liberal worlds of journalism, the foundations, and the academy on the one hand, and the wider realities of American life on the other. Within the magic circle, liberal ideas have never been more firmly entrenched and less contested. Increasingly, liberals live in a world in which certain ideas are becoming ever more axiomatic and unquestioned even if, outside the walls, those same ideas often seem outlandish.

Modern American liberalism does its best to suppress dissent and critique (except from the left) at the institutions and milieus that it controls. Dissent is not only misguided; it is morally wrong. Bad thoughts create bad actions, and so the heretics must be silenced or expelled. “Hurtful” speech is not allowed, and so the eccentricities of conventional liberal piety pile up into ever more improbable, ever more unsustainable forms.