the Wind that Shakes the Barley
A very realistic portrayal of a war for national independence. It's not "realistic" like "300," which bathes the viewer in blood. Instead, it captures the feeling of the war, complete with a sense of the conflicts between different groups of fighters for independence.
The Bushies should see it to get a feel of how occupiers of another country are seen by the residents, while the Iraqi "insurgents" should see it to get a feel for what may happen in their future.