The Iraqi sunnis hate the Iraqi and Iranian shia who are the majority. We have been lending support to the Iraqi shia government who is aligned with the Iranian shia in their fight against sunnis jihadists from all over the Mideast aligned with Iraqi sunni who are fighting the shia. This could be a shot across the bow to the shia government that we are going to open up the sunnis to killing the Iranian shia in Iraq. Basically we win both ways if we pull back and let the sunnis take aim at the Iranian shia in Iraq. I detest them both but we always win when they are killing each other.
If I researching correctly, it looks like the Sunnis are going to need the Kurds to control Iraq.
I see a civil war in Iraq within the next year.