Chris Hitchens believes so and proves it here.
It starts with this bit of news:
In February 2004, our Kurdish comrades in northern Iraq intercepted a courier who was bearing a long message from Abu Musab al-Zarqawi to his religious guru Osama bin Laden. The letter contained a deranged analysis of the motives of the coalition intervention ("to create the State of Greater Israel from the Nile to the Euphrates" and "accelerate the emergence of the Messiah"), but also a lethally ingenious scheme to combat it. After a lengthy and hate-filled diatribe against what he considers the vile heresy of Shiism, Zarqawi wrote of Iraq's largest confessional group that: "These in our opinion are the key to change. I mean that targeting and hitting them in their religious, political and military depth will provoke them to show the Sunnis their rabies . . . and bare the teeth of the hidden rancor working in their breasts. If we succeed in dragging them into the arena of sectarian war, it will become possible to awaken the inattentive Sunnis as they feel imminent danger."
And ends with this great line:
There is a war within the war, as there always is when a serious struggle is under way, but justice and necessity still combine to say that the task cannot be given up.
Read the whole thing please.