I finished watching this movie. It is OK movie. documentary story line ends back to 2004. It is interesting to know how this entire resistance started.
Initially ( way back in 2003) there is no resistance, then foreign fighters pour in to build the guilt and sense of responsibility in iraqi's, then secret cells are formed from common man and organized by , some of the old military guys. They say they recruit after 25 days of spying on aspirant. Phantom donors of money and resistance people them self contribute some percent of daily earning are the sources of money. They say they buy weapons from long term smugglers only focused on specialized weapons like rocket launchers and long distance missile targets etc. That way they can have big hit. It does have very horrific violent pictures of victims of cross fire. This sounds like CIA feeding them with money and weapons.