Andrew Sullivan has some good words today about denialism.
Some of the current GOP delusions: the deficit is rising (it isn’t); the debt is currently unsustainable (it isn’t); the public wants Obamacare ended (it’s split on even delaying it); climate change has nothing to do with human-produced carbon emissions (it is, according to almost every single reputable scientist examining the issue). Why are we surprised that the people who predicted a Romney landslide a day before he was trounced might actually be prone to believing in things that simply are not true by any empirical, objective standard? That’s the true danger here. Their epistemic closure is now not just threatening them, but all of us.
. . . The GOP is currently threatening not just the core stability of the American economy but of the entire global economy. And the ultimate sign of their craziness is that they deny that – against universal agreement among economists for whom the word “catastrophe” keeps popping up – there is any threat at all.