Apparently the Iraqi insurgency can be boiled down to native sons who hate the Americans and foreign fighters flush with cash and fanaticism, fighting under the banner of Al Queda. In the initial months of the insurgency, the two sides more or less worked together towards the common goal of sticking it to the Americans, but reacently the Iraqi nationalist insurgents have become fed up with the cold-blooded lunacy of Al Queda and told them to go to hell. The Guardian details the schism.
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