The attacks of 9/11 have nothing to do with the war in Iraq, say some congressional critics of President Bush's speech this week urging the citizenry to have patience with efforts to quell an insurgency so that a liberated people can govern themselves. But, of course, the main reason we are in Iraq and the main thing keeping us there is what we learned through the dramatic, murderous foreshadowing of the attacks four years ago - that Islamic-fascist terrorists could bring an end to American civilization. The fiction propagated by war opponents has been that the invasion of Iraq had...