ReBeL said:
Sunnis are already so annoyed by the current situation, and his killing will be seen as another cooperation for the Shia'as with the occupiers, which will lead to more violent fights...
No, I'm not buying it. It's too simplistic.
By dethroning Saddam Hussein and introducing "democracy", the US have effectively placed the whole nation under the rule of the Shia majority. The army (mainly lead by Sunni officers) was dissembled, over fifty thousand bureaucrats (most of them Sunni) were fired and dozens of state owned companies (usually managed by Sunni) were closed. The old Iraq ceased to exist completely.
Ever since then, the Shia leaders have been fully opposed to strike deals of compromise with their Sunni counterparts (not that the Sunni part of the population actually possesses leaders as such). Prime Minister Nuri al-Maliki (I might be wrong on the spelling here) has been known to point out that if all authority was granted to the Iraqi army, order would be restored within months. It's not too extreme to say that he intends for the Sunni to be crushed.
The Sunni in turn are possessed with an urge to fight seeing as they have all the reason in the world to believe they are fighting for their very existence. They are infuriated the US toppled their position of power to a point where they are blind to recognise that if the American troops were to leave this instant, they would probably be massacred in the vacuum left behind.
All of this is taking place in a nation partially torn. Partially, because Kurdistan as an autonomous region is relatively calm, unemployment is falling and because it has leaders looking to the West, its economy is slowly but surely starting to climb out of the black hole it was stuck in. Which means the Kurds are well beyond the stage where they care about what happens to Saddam. Quite simply, they have moved on and that means one population group is already completely indifferent regarding the old dictator.
That leads me to conclude Saddam's death would play a very marginal role in the conflict given that:
1) The conflict has evolved well beyond the stage where the Sunni population is trying to restore the old balance and put Hussein back in charge.
2) Kurdistan is a success story and the Kurds stopped caring about him altogether.
The only significant impact Saddam Hussein could possibly have: is if the Americans were to somehow stop his death. Which is tricky. It would probably anger the Shia, but it might make the Sunni realise the Americans are not their biggest problem. An American interference might, in a very hopeful scenario, create new possibilities of finding a solution to the conflict.
A conflict which in essence has moved well beyond a stage where it matters a great deal if Saddam lives or dies.