Because of his Basqueness, he was too independent and too judgmental, but those last two qualities were not terribly far from the mainstream of Spanish values. He killed Carmen because she did evil things and should be punished. He couldn't help it, he was brought up that way. Leo lists some of the diseases which are categorized, numbered and defined in The Diagnostic and Statistical Manual of Mental Disorders, and which have been used by defense attorneys to get their clients either declared innocent or in need of medical treatment. It would seem that there has been a shift in legal thinking, and therefore, thinking in many of the socio-behavioral disciplines.
Society is no longer at fault.
It's all in the genes. I'm a sex addict, a phallophiliac. It's something I cannot control. I've tried to get help, and if you were only more responsive and willing, maybe I wouldn't have to run off to all these other guys. But I can't stop it, and you need to understand that.