How ISIS leader Abu Bakr al-Baghdadi became a feared preacher of hate
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A preacher of hate. The instigator and inspirer of some of the most hideous acts of violence ever put to video. An elusive fugitive, hunted by drones, only once seen in public. The perverter of Islam with a nauseatingly infectious ideology that had a greater lure to a disenfranchised minority than anything comparable since the 1970s.