How?

Iraq is out of control! How on earth is the government supposed to put out some call and tell everyone to stop fighting and play nice?

A U.N. envoy urged Iraq's government on Saturday to halt a slide into civil war and stop the "cancer" of sectarianism from destroying the country, warning that the carnage of this week could tear Iraq apart.

The U.N.'s special representative for Iraq, Ashraf Qazi, said car bombs on Thursday that killed more than 200 people in a Shi'ite area of Baghdad and "blind acts of revenge" were part of a vicious cycle of sectarian violence "tearing apart the very political and social fabric of Iraq".

"No country could tolerate such a cancer in its body politic," Qazi said in a statement.

Here's a clue: it's already is a civil war. The government never really was in charge. They cannot "stop the violence."