It is very rare that a murderous thug like Saddam is punished. Had Pol Pot, Augusto Pinochet, Idi Amin Dada and Bokassa ended up on the gallows, I might have been able to see it as justice.
Saddam was a mediocre brute made bigger by accidents of fate and the cirumstances of his times. Sadly, I fear the future will bring forth more of his kind.