I also recall the US government doing a cease fire with his group as well, which helped lead to the "OMG the surge is totally working", because Sadr decided to lay off fighting off the US occupation.
Evidently, the US and Iraqi government figure Eh - second's time the charm. But not to worry - it just proves the Surge is working when lots of people start dying again.
And why does the Iraqi government and the US government have such a hard on for al-Sadr? Isn't because he opposes 30 year oil contracts with US businesses that he feels should be owned by Iraqi's instead of foreign nationals. I mean, we wouldn't go to war as something as silly as war and money, right?
“My friends, I will have an energy policy which will eliminate our dependence on oil from Middle East that will then prevent us from having ever to send our young men and women into conflict again in the Middle East.” - Source: Crooks and Liars
Oh. Well, we wouldn't go to war over oil *again*. That's different.