Some 'heretical' thoughts: what's wrong if Iraq breaks up into three fragments (Sunni, Shia and Kurd), without any violence, something along the lines of the velvet revolution in Czechoslovakia? There wasn't a country called Iraq prior to 1918, anyway. On the positive side, the internal divisions tearing Iraq apart would disappear once and for all (assuming that these internal divisions are not a figment of the imagination).
Other considerations:
- This would play right into Israel's hands by permanently weakening one of its powerful enemies.
- Turkey would never allow this, as its own Kurdish minority would clamour vigorously to become a part of the new Kurdish state.
- The Americans would get to play their democracy-exporting games in three countries for the price of one.