Newtown shooter Adam Lanza was an isolated young man with deteriorating mental health and a fascination for mass violence whose problems were not ignored but misunderstood and mistreated.The report says that Lanza's mental health problems included "autism, anxiety disorder, obsessive-compulsive disorder, and suicidal disorder." The report also says that his mother made his condition worse by refusing medical treatment, keeping him at home, and not restricting his access to guns.
All of the above notwithstanding, the report concludes that "In the end, only [Lanza], and [Lanza] alone, bears responsibility for this monstrous act." But why? Why think that Lanza is responsible (i.e., that he is worthy of blame or that he deserves punishment) for the shooting despite the numerous mental health problems he suffered from?