Even by U.S. standards, it takes some big stones to justify attacking a nation that never attacked, or threatened to attack, you, then pretending that you know about weapons of mass destruction, then getting caught lying and then not only not apologizing and immediately withdrawing but doubling down (the "surge")...
When you broadcast every day that an isolated Middle Eastern dictatorship is a totalitarian beast bent on reducing America to ashes and irradiated rubble, when you appease lawbreakers like Bush, Cheney, Rumsfeld and John Yoo, when you say that antiwar activists would literally destroy the country if they could, to score cheap political points, you can't profess surprise when some people decide that war is the only means of forestalling the disaster you have warned them about.