That honeymoon, if it was one, is over. Conservatives have legitimate ideological beefs with Obama, rightly expressed in sharp language. But the invective in some quarters has unmistakably amped up. The writer Camille Paglia, a political independent and confessed talk-radio fan, detected a shift toward paranoia in the air waves by mid-May. When “the tone darkens toward a rhetoric of purgation and annihilation,” she observed in Salon, “there is reason for alarm.” She cited a “joke” repeated by a Rush Limbaugh fill-in host, a talk-radio jock from Dallas of all places, about how “any U.S. soldier” who found himself with only two bullets in an elevator with Nancy Pelosi, Harry Reid and Osama bin Laden would use both shots to assassinate Pelosi and then strangle Reid and bin Laden.

This homicide-saturated vituperation is endemic among mini-Limbaughs. Glenn Beck has dipped into O’Reilly’s Holocaust analogies to liken Obama’s policy on stem-cell research to the eugenics that led to “the final solution” and the quest for “a master race.” After James von Brunn’s rampage at the Holocaust museum, Beck rushed onto Fox News to describe the Obama-hating killer as a “lone gunman nutjob.” Yet in the same show Beck also said von Brunn was a symptom that “the pot in America is boiling,” as if Beck himself were not the boiling pot cheering the kettle on.

But hyperbole from the usual suspects in the entertainment arena of TV and radio is not the whole story. What’s startling is the spillover of this poison into the conservative political establishment. Saul Anuzis, a former Michigan G.O.P. chairman who ran for the party’s national chairmanship this year, seriously suggested in April that Republicans should stop calling Obama a socialist because “it no longer has the negative connotation it had 20 years ago, or even 10 years ago.” Anuzis pushed “fascism” instead, because “everybody still thinks that’s a bad thing.” He didn’t seem to grasp that “fascism” is nonsensical as a description of the Obama administration or that there might be a risk in slurring a president with a word that most find “bad” because it evokes a mass-murderer like Hitler.

Image Frank Rich Credit... Fred R. Conrad/The New York Times

The Anuzis “fascism” solution to the Obama problem has caught fire. The president’s nomination of Sonia Sotomayor to the Supreme Court and his speech in Cairo have only exacerbated the ugliness. The venomous personal attacks on Sotomayor have little to do with the 3,000-plus cases she’s adjudicated in nearly 17 years on the bench or her thoughts about the judgment of “a wise Latina woman.” She has been tarred as a member of “the Latino KKK” (by the former Republican presidential candidate Tom Tancredo), as well as a racist and a David Duke (by Limbaugh), and portrayed, in a bizarre two-for-one ethnic caricature, as a slant-eyed Asian on the cover of National Review. Uniting all these insults is an aggrieved note of white victimization only a shade less explicit than that in von Brunn’s white supremacist screeds.

Obama’s Cairo address, meanwhile, prompted over-the-top accusations reminiscent of those campaign rally cries of “Treason!” It was a prominent former Reagan defense official, Frank Gaffney, not some fringe crackpot, who accused Obama in The Washington Times of engaging “in the most consequential bait-and-switch since Adolf Hitler duped Neville Chamberlain.” He claimed that the president  a lifelong Christian  “may still be” a Muslim and is aligned with “the dangerous global movement known as the Muslim Brotherhood.” Gaffney linked Obama by innuendo with Islamic “charities” that “have been convicted of providing material support for terrorism.”

If this isn’t a handy rationalization for another lone nutjob to take the law into his own hands against a supposed terrorism supporter, what is? Any such nutjob can easily grab a weapon. Gun enthusiasts have been on a shopping spree since the election, with some areas of our country reporting percentage sales increases in the mid-to-high double digits, recession be damned.