I don't think that protecting the local populace from their government is why we will stay in Iraq. We'll be in Iraq because Iran is right next door. Iran is the THE PROBLEM in the Middle East and if we want to contain the spread of the "Religion of Peace" with it's death squads of Jihad-warriors then we are going to have to contain Iran. 50,000 troops and air bases in Iraq would be a good start. Pull them out of Europe where they are not needed and send them to Iraq.
Judging from the article that seems to be a big part in why they want us to stay.