"the stab in the back has become the sustaining myth of modern American nationalism. Since the end of World War II it has been the device by which the American right wing has both revitalized itself and repeatedly avoided responsibility for its own worst blunders. Indeed, the right has distilled its tale of betrayal into a formula: Advocate some momentarily popular but reckless policy. Deny culpability when that policy is exposed as disastrous. Blame the disaster on internal enemies who hate America. Repeat, always making sure to increase the number of internal enemies.
As the United States staggers past the third anniversary of its misadventure in Iraq, the dagger is already poised, the myth is already being perpetuated. To understand just how this strategy is likely to unfold—and why this time it may well fail—we must return to the birth of a legend."
This looks like an excellent analysis of a potent political narrative, which is sometimes used to prevent the populace from learning anything from the abject of stupid, conservative policies.