No, there would be war and special ops assasinating people if those americans did not go to iran willingly to begin with. I never understand why this moral indignation by some people about US foreign policy never accounts for military might and it's role in deciding these things. Every country uses it's might to protect its people and interests, that isn't a moral thing, it's a survival thing.
Saudi kidnapped, tortured and murdered an american journalist and they got away with it because that was in the interest of the US. Nation states are not instruments of justice, they exist because they are strong enough. All those people in Guantanamo did not belong to a country who could keep them safe and secure.