Yeah, I see this as an attempt by the very few survivors of the isolationist wing of the conservative movement to start for the lack of a better word 'a jihadist war' inside the conservative movement. Instead of using suicide bombers to get Sunni and Shiite to warring (Zarqawi's strategy) the Buchanon-Roberts wing are attacking Bush to initiate the same thing figuring when the rubble clears they will be standing and in control. You might say this is their last hope of regaining power.
"Crusade" comes to mind....