http://www.foxnews.com/story/0,2933,289372,00.html KAGAN: The surge is going very well. Major operations began on June 15th. The period prior to that was a period of preparation, deployment of forces.
...
The reason why we have a civil war in Iraq, the reason why we have sectarian violence, is because Al Qaeda deliberately set out to create and foment sectarian violence.
It was the bombing of the Samarra mosque in 2006 which set off this round of intense sectarian violence, which only began to drop again in January as the surge began, and Al Qaeda's still at it. That's why they went after the minarets of the Samarra mosque not very long ago.
And so Al Qaeda — their whole strategy revolves around generating sectarian violence, because that's how they embed themselves in local communities in Iraq.