Why do people support the war in Iraq? because we can. they attacked us back in 1993 and 9-11, we are going to finish what they started.
Israel against Egypt, Syria, Iraq and more.
they support ayatollah Sistani the leader of Shia Muslims of Iraq.
Iraq
The Islamic state in Iraq and Syria get support from Saudi Arabia ,Qatar , turkey and USA
Arabs and Kurds
The US stakes in Iraq include national security and curbing of the insurgent groups.
Arabs and Kurds!
Kurds, Sunni, and Shiites.
Arabs and Kurds
Oil
The approximations are not clear. It all depends on what operations are to be performed to end the war, plus what is the definition of ending a war. Iraq problem is that there are abour 20 different interest groups - nationalities, religions, other - that have different interconnections and different dislikes/hates towards the other. It doe not seem likely to solve the war by force, neither it did before starting it. A simple leaving the Iraq for the united forces would only cost a few bilions.