That is a big concern. It certainly would put a halt to the plan. If you have any reports of such a thing happening, please add it.
Well, there was a report of Shia policemen serving as mere bystanders, doing nothing, while some Sunnis were being doused with gasoline, and then put to the torch as human pyres. The government has twarted US troops going after perps in Sadr City. From what I can tell, US relations with the Iraqi government are deteriorating rapidly, and I think this issue is the primary reason.