Joe Biden: Decentralize and split Iraq

Senator Biden wants to decentralize and split Iraq into ethnic regions. I'm going to have to side with the Sunnis and question the wisdom of this. The Sunnis oppose it because they stand to lose the most in the deal, being from a region that isn't a heavy oil producing region. I question it because in a society that is already contentious with ethnic division, do you really want to deepen that division by creating hard lines and borders that allow a form of ethnic nationalism to bloom? The regions will cease to be Iraqi; instead they will become fervently Sunni, Shia, and Kurdish. That geographical division is just asking for full fledged civil war. Talk about your Balkanization.