Lets put this in perspective. Civil war may be too noble a title for what’s going on in Iraq. Vigilante groups are conducting the violence we see after the mosques bombing not a functioning government.
A Civil War is a war between factions of the same country; there are five criteria for international recognition of this status: the contestants must control territory, have a functioning government, enjoy some foreign recognition, have identifiable regular armed forces, and engage in major military operations.
We have now a legally established government in Iraq, whose international recognized authority will not change by force, espionage, sabotage, subversion, manipulation, deception, intimidation, or propaganda and still remain legitimate. The only international recognized recourse the population has for a change in government is through legal elections. What I see occurring in Iraq is a resistance movement, an organized effort by some portion of the civil population of the country to resist the legally established government by disrupting civil order and stability. Not a civil war. The Sunni have the most to lose