First of all, I have no sympathy for Saddam Hussein himself. Execution served him right for being the perverse, murderous tyrant that he his. However, rushing into killing the guy after a mock-TV trial on Eid day is absolute retardation! It further inflamates a war-ridden Iraq and, instead of serving Saddam with his much-deserved shameful ending, created a martyr out him for many people in Iraq and the Arab world.
The trial of Saddam, established under the supervision of an occupying power, lacked any international legitimacy or standards of fair due process. It is a puzzle that the US rejected any demand for establishing a recognized international tribunal. [history shows the success of ICTY in Yougoslavia, ICTR in Rwanda, and the Nuremberg trials after WWII in fostering national healing and reconciliation while at the same time serving justice]. Instead, it opted for a trial that aggrevated the Sunnis even further - alienate them from their Shia brethen - and will ultimately lead to more violence and counter-violence in response. It will always be seen as a "victor's justice," imposed forcefully by an alien occupying power. One can almost say the US consciously wanted to end any prospect of actually conducting a legitimate investigation into Saddams crimes or disclosing any truth!