Nir on why US troops should leave Iraq now. "As long as the United States remains in Iraq, no Iraqi government will be viewed as legitimate. Sunnis will continue to view Shias as collaborators and boycott the government, fighting both Americans and their Shia accomplices. Iraqi militias allied with the United States will feel free to continue torturing and killing, knowing their American big brother supports them. Americans will continue to alienate more and more Iraqis through humiliation and killings, adding recruits to the resistance. Radical Islamist hostility to the occupation will increase. More foreign mujahideen will infiltrate Iraq, seeking to fight against “the Crusaders and Jews” in a battle to re-establish the caliphate that will end only on judgment day. The jihad will spread, as it already has, as veterans of the jihad in Iraq take their fight elsewhere."