Dayuhan,

It isn't rocket science, we (to include other states who take an interest in this) have a number of tools to support the central government and weaken opposition parties who desire to break away. We, along with other states, have a long history of supporting governments that some parties would have desired to break away from, but due to foreign assistance the governments were too strong to challenge.

With the exception of the Kurds, I haven't heard any other group express a desire to further divide Iraq. Has anyone heard Sunnis and Shia agreeing on a potential division of Iraq? If the Kurds control the northern oil fields and the Shia the southern oil fields, what does that leave for the Sunni?

I really don't think dividing Iraq into three separate states will work upon further consideration for a lot of reasons. Maybe promoting and enabling an independent Kurdistan would be in our interest.