What’s happening here ain’t exactly clear. But I have a notion: The Republicans are finally having their ’60s. Half a century after the American left experienced its days of rage, its repudiation of the political establishment, conservatives are having their own political catharsis. Ted Cruz is their spotlight-seeking Abbie Hoffman. (The Texas senator’s faux filibuster last week reminded me of Hoffman’s vow to “levitate” the Pentagon using psychic energy.) The Tea Party is their manifesto-brandishing Students for a Democratic Society. Threatening to blow up America’s credit rating is their version of civil disobedience. And Obamacare is their Vietnam.

To those of us who lived through the actual ’60s, the conservative sequel may seem more like an adolescent tantrum than a revolution. For obvious starters, their mobilizing cause is not putting an end to an indecent war that cost three million lives, but defunding a law that promises to save lives by expanding access to insurance. Printing up unofficial “Obamacare Cards” and urging people to burn them is a silly parody of the protest that raged 50 years ago. But bear with me.

At the heart of the ’60s radical zeitgeist was a sense that the government had forfeited its legitimacy, and that the liberal establishment had sold out or lost its nerve. At the heart of the right-wing uprising is a similar sense of betrayal: the president is not just an adversary but an alien; the Republican leadership has lost its principles; the old rules don’t apply.