A study funded by the U.S. government has concluded that conservatism can be explained psychologically as a set of neuroses rooted in "fear and aggression, dogmatism and the intolerance of ambiguity." The report's four authors linked Hitler, Mussolini, Ronald Reagan and the rightwing talk show host, Rush Limbaugh, arguing they all suffered from the same affliction. All of them "preached a return to an idealised past and condoned inequality."

The study, "Political Conservatism as Motivated Social Cognition," received $1.2 million in public funds for their research from the National Science Foundation and the National Institutes of Health. The authors also examined the psyche of President George Bush, who turns out to be a textbook case of this social disease. The telltale signs are his preference for moral certainty and his total lack of appreciation for nuance. "This intolerance of ambiguity can lead people to cling to the familiar, to arrive at premature conclusions, and to impose simplistic cliches and stereotypes," the authors argued in their report, printed in the Psychological Bulletin.

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Well, I've always figured they had trouble thinking outside the box.
Guess this just makes them <insecure.>