OAKLAND, Calif. — Five months before Friday’s raging fire killed at least 36 people at the “Ghost Ship” warehouse, the brainchild of the cluttered artists’ cooperative took to Facebook in a 1,000-word rant claiming he was “the thriller love child of Manson, Pol Pot and Hitler.” There was little sense to the bizarre writing of Derick Ion Almena, 46, known as a passionate artist from Los Angeles devoted to an alternative way of life who led the Oakland arts collective and commune with a distorted sense of reality.