"A lot of people on the ground there thought that if we'd have gone into Falluja at the time, the interim government would not have been established,"
President George Bush Source
But Why is handover to the interim goverment so important?
Bremer had found his legal loophole: There would be a window—seven months—when the occupation was officially over but before general elections were scheduled to take place. Within this window, the Hague and Geneva Conventions’ bans on privatization would no longer apply, but Bremer’s own laws, thanks to Article 26, would stand. During these seven months, foreign investors could come to Iraq and sign forty-year contracts to buy up Iraqi assets. If a future elected Iraqi government decided to change the rules, investors could sue for compensation.
But Bremer had a formidable opponent: Grand Ayatollah Ali al Sistani, the most senior Shia cleric in Iraq. al Sistani tried to block Bremer’s plan at every turn, calling for immediate direct elections and for the constitution to be written after those elections, not before. Both demands, if met, would have closed Bremer’s privatization window. Then, on March 2, with the Shia members of the Governing Council refusing to sign the interim constitution, five bombs exploded in front of mosques in Karbala and Baghdad, killing close to 200 worshipers. General John Abizaid, the top U.S. commander in Iraq, warned that the country was on the verge of civil war. Frightened by this prospect, al Sistani backed down and the Shia politicians signed the interim constitution. It was a familiar story: the shock of a violent attack paved the way for more shock therapy.
Naomi Klein Source