The Iraqi government

Is actually the Shiite group that supports al-Maliki that is fighting the Sunni groups that resent the Shiite hold on power because of their use of death squads... So what do we do while al-Maliki goes to Tehran to open diplomatic ties?

We attack al-Sadr's section of Baghdad, a Shiite stronghold.

Juan Cole of Informed Consent:

The US military took advantage of Prime Minister Nuri al-Maliki's absence from the country to settle some scores with the Mahdi Army in Sadr City (East Baghad), attacking units there and mounting air strikes on them, killing 32 and wounding about a dozen. Local observers claimed that the attacks killed 9 innocent civilians, but the US military said the casualties were militiamen. When al-Maliki is in Baghdad, he tends to run interference for the Sadr Movement, which elected him to office, and to attempt to convince the US military to put off attacking these Shiite forces until after the Sunni Arab guerrillas are dealt with decisively.

Iraqslogger shows the reaction in Sadr City. It isn't pretty.

Not only did the US military attack these Shiite forces unilaterally, but its spokesmen attempted to link the Mahdi Army cell attacked to the importation of explosively formed projectiles from Iran.

It cannot be an accident that both the attack and the attempt to implicate Iran (with no evidence for the allegations against Tehran provided) came while al-Maliki was in Tehran for high level consultations with the Iranian government.

Maybe somebody's score card was upside down or something....