Since when has a unified Iraq been in our interests? Forcing Kurdistan to be a part of Iraq is just sheer lunacy. The Kurds have had national universities, a working parliament and a developing infrastructure for the last 13 years. Forcing them back into Iraq would ruin one of the regions in the Middle East which are our allies. The quicker we establish an offically recognized Kurdistan, the better. Our fickle "allies" Turkey can go to hell as far I'm concerned.
Well that "lunacy" is our present policy. It may not be the right policy but it is what we are implementing. So, like it or not, If the Israelis have another arrangement in mind then they are working against US policy.
1) Turkey fears that Iraq will turn into a radical Shiite state. A free Kurdistan could serve as a buffer.
2) A free Kurdistan would be stable, ensuring thriving trade between Kurdistan and Turkey -- to the economic benefit of both.