Iraqi Civil War

Not only do we not know who the Iraqi insurgents are, we don't know if the situation there is already a civil war:

From the moment American troops crossed the border 28 months ago, the specter hanging over the American enterprise here has been that Iraq, freed from Mr. Hussein's tyranny, might prove to be so fractured - by politics and religion, by culture and geography, and by the suspicion and enmity sown by Mr. Hussein's years of repression - that it would spiral inexorably into civil war.

If it did, opponents of the American-led invasion had warned, American troops could get caught in the crossfire between Sunnis and Shiites, Kurds and Turkmen, secularists and believers - reduced, in the grimmest circumstances, to the common target of a host of contending militias.

Now, events are pointing more than ever to the possibility that the nightmare could come true. Recent weeks have seen the insurgency reach new heights of sustained brutality. The violence is ever more centered on sectarian killings, with Sunni insurgents targeting hundreds of Shiite and Kurdish civilians in suicide bombings. There are reports of Shiite death squads, some with links to the interior ministry, retaliating by abducting and killing Sunni clerics and community leaders.

The past 10 days have seen such a quickening of these killings, particularly by the insurgents, that many Iraqis are saying that the civil war has already begun.