Learn some history. When the French left Indochina, the agreement was for a divided Vietnam until elections could be held. The West aided the South Vietnamese gov’t in postponing the elections because it was clear that Ho Chi Minh would win. When the North Vietnamese attacked, aided by the large numbers of South Vietnamese who also opposed the Saigon gov’t, they drove out the French forces and our adventure of “military advisers” began, until it became obvious that the effort was unsustainable.
So when we withdrew (two years before this scene), it was because we were tired of propping up a corrupt government that was not representative of the mass of Vietnamese people, not because they asked us to or because we felt they were at a point of self-sustaining, but, most important in this comparison, we had not toppled a government that had previously kept the nation unified.
Hussein, for all his faults, had kept Iraq in place and we disrupted that. There is a difference between propping up something that cannot work and destroying something that did work.