"Back in April, there was a huge fuss over an internal report by the Department of Homeland Security warning that current conditions resemble those in the early 1990s - a time marked by an upsurge of right-wing extremism that culminated in the Oklahoma City bombing.

Conservatives were outraged. The chairman of the Republican National Committee denounced the report as an attempt to "segment out conservatives in this country who have a different philosophy or view from this administration" and label them as terrorists.

But with the murder of Dr. George Tiller by an anti-abortion fanatic, closely followed by a shooting by a white supremacist at the United States Holocaust Memorial Museum, the analysis looks prescient.

There is, however, one important thing that the D.H.S. report didn't say: Today, as in the early years of the Clinton administration but to an even greater extent, right-wing extremism is being systematically fed by the conservative media and political establishment.

Now, for the most part, the likes of Fox News and the R.N.C. haven't directly incited violence, despite Bill O'Reilly's declarations that "some" called Dr. Tiller "Tiller the Baby Killer," that he had "blood on his hands," and that he was a "guy operating a death mill." But they have gone out of their way to provide a platform for conspiracy theories and apocalyptic rhetoric, just as they did the last time a Democrat held the White House.

And at this point, whatever dividing line there was between mainstream conservatism and the black-helicopter crowd seems to have been virtually erased.

And then there's Rush Limbaugh. His rants today aren't very different from his rants in 1993. But he occupies a different position in the scheme of things. Remember, during the Bush years Mr. Limbaugh became very much a political insider. Indeed, according to a recent Gallup survey, 10 percent of Republicans now consider him the "main person who speaks for the Republican Party today," putting him in a three-way tie with Dick Cheney and Newt Gingrich. So when Mr. Limbaugh peddles conspiracy theories - suggesting, for example, that fears over swine flu were being hyped "to get people to respond to government orders" - that's a case of the conservative media establishment joining hands with the lunatic fringe.

What will the consequences be? Nobody knows, of course, although the analysts at Homeland Security fretted that things may turn out even worse than in the 1990s - that thanks, in part, to the election of an African-American president, "the threat posed by lone wolves and small terrorist cells is more pronounced than in past years."

And that's a threat to take seriously. Yes, the worst terrorist attack in our history was perpetrated by a foreign conspiracy. But the second worst, the Oklahoma City bombing, was perpetrated by an all-American lunatic. Politicians and media organizations wind up such people at their, and our, peril."
http://www.nytimes.com/2009/06/12/opinion/12krugman.html?ref=opinion