Actually...
If Iran crossed the border into Iraq and really began to interfere it would refuel the need for more "Liberation".
US would over run Iran as well.
Iran would fall in less than 2 weeks just like Iraq.
Hand government over to IRAQ in June and it would be perfect timing for regime change in Iran.
Its not the American Military machine that has gone haywire its the American leadership system, so maybe Iran had just better shut the fuck up.