Iran is supporting both Sunni and Shia insurgents? How interesting.
This is not a civil war. This a war of Iran, a bunch of Iraqi outcasts (both Shia and Sunni) and Al Qaeda against mostly 25 million innocent Iraqi citizens and our precious soldiers.
The Iraqi government, their 350K troops and their police(for the most part) will fall in on the right side.
Sounds like the Iranians have been playing both sides up the middle.