Reading the Wikipedia article, one can see similarities in the history of Sutcliffe, Eliot Rodger and Jack The Ripper in that they were all misogynists who took to 'punishing' women for how they had perceived they had failed them, when it was largely their own shortcomings that had contributed to this [though one can only speculate in the case of Jack The Ripper]. Sutcliffe's wife failed to bear him children and had an affair, whereas Rodger repeatedly berated women for not wanting him, when it was his own awkwardness and attitude that made him unattractive.