It is not glib or inaccurate to invoke Oklahoma City in this context, because the acrid stench of 1995 is back in the air. Two days before Stack’s suicide mission, The Times published David Barstow’s chilling, months-long investigation of the Tea Party movement. Anyone who was cognizant during the McVeigh firestorm would recognize the old warning signs re-emerging from the mists of history. The Patriot movement. “The New World Order,” with its shadowy conspiracies hatched by the Council on Foreign Relations and the Trilateral Commission. Sandpoint, Idaho. White supremacists. Militias.

Image Credit... Barry Blitt

Barstow confirmed what the Southern Poverty Law Center had found in its report last year: the unhinged and sometimes armed anti-government right that was thought to have vaporized after its Oklahoma apotheosis is making a comeback. And now it is finding common cause with some elements of the diverse, far-flung and still inchoate Tea Party movement. All it takes is a few self-styled “patriots” to sow havoc.

Equally significant is Barstow’s finding that most Tea Party groups have no affiliation with the G.O.P. despite the party’s ham-handed efforts to co-opt them. The more we learn about the Tea Partiers, the more we can see why. They loathe John McCain and the free-spending, TARP-tainted presidency of George W. Bush. They really do hate all of Washington, and if they hate Obama more than the Republican establishment, it’s only by a hair or two. (Were Obama not earning extra demerits in some circles for his race, it might be a dead heat.) The Tea Partiers want to eliminate most government agencies, starting with the Fed and the I.R.S., and end spending on entitlement programs. They are not to be confused with the Party of No holding forth in Washington  a party that, after all, is now positioning itself as a defender of Medicare spending. What we are talking about here is the Party of No Government at All.

The distinction between the Tea Party movement and the official G.O.P. is real, and we ignore it at our peril. While Washington is fixated on the natterings of Mitch McConnell, John Boehner, Michael Steele and the presumed 2012 Republican presidential front-runner, Mitt Romney, these and the other leaders of the Party of No are anathema or irrelevant to most Tea Partiers. Indeed, McConnell, Romney and company may prove largely irrelevant to the overall political dynamic taking hold in America right now. The old G.O.P. guard has no discernible national constituency beyond the scattered, often impotent remnants of aging country club Republicanism. The passion on the right has migrated almost entirely to the Tea Party’s counterconservatism.

The leaders embraced by the new grass roots right are a different slate entirely: Glenn Beck, Ron Paul and Sarah Palin. Simple math dictates that none of this trio can be elected president. As George F. Will recently pointed out, Palin will not even be the G.O.P. nominee “unless the party wants to lose at least 44 states” (as it did in Barry Goldwater’s 1964 Waterloo). But these leaders do have a consistent ideology, and that ideology plays to the lock-and-load nutcases out there, not just to the peaceable (if riled up) populist conservatives also attracted to Tea Partyism. This ideology is far more troubling than the boilerplate corporate conservatism and knee-jerk obstructionism of the anti-Obama G.O.P. Congressional minority.