Can you honestly say that a country where 2,000 civilians are killed each month has been stabilized?
It is estimated Saddam kill over 300,000 (not including the Iran/Iraq War or 1st Gulf War) of his own people. Divide that by 2000 and you get 150 months worth (or 12 and a half years worth) at the rate you point to. So my question to you is do you think that was a "stable" Iraq under Saddam or is it unstable just because the US is there?
In the American Revolution (1776 - 1782) there were 25,435 causalities. US population 1776 was 2,527,450.
Iraq's population in 2003 was 25,175,000.
So if you look at it by percentages, Iraq obtained their freedom much cheaper in terms of total loss of live that the US did. The main difference here is that less Americans killed other Americans than Iraqi vs Iraqi violence. You can claim every life is precious, and deaths are a sad fact, but what is the price of freedom? I'm sure the Iraqis will be better off when the fighting ends and appreciate the US help.