If we can get a reasonably stable democracy working over there, the human cost will drop to near-zero for a great many years.
´We´? It seems to me that it´s up to Iraq to establish ´a stable democracy´. That might be a bit of a problem, considering that Iraq never had one in the first place; there simply isn´t a democratic tradition. Slight oversight on the part of the 2nd Gulf War initiators?
Second, since the 2nd Gulf War was de facto only supported by the US and UK, any other support received after the deed was a lucky plus indeed. That such support was to be conditional should come as no surprise.
Third, the various interests of
every people living in the same state are
always in conflict. That´s just a given. (And when you have no democratic tradition that may very well escalate into violent conflict.)
Fourth, the 2nd Iraq invasion has de facto resulted in a
destabilization of the country: al Qaeda activity only started
after Saddam´s regime was toppled (Saddam was never involved with al Qaeda), various national insurgencies surfaced, and Iran influence in the country has decidedly increased following the invasion (especially among the Shiite population).
That said, I think it´s safe to say that the majority of the Iraqis wouldn´t want to go back to the previous situation, so everybody just will have to deal with it.