That seems reasonable. But ...Pretty simple, really: The assailant was an adult.
Let's take a more extreme example. Let's say Islamic fundamentalists raise their kid steeped in the jihadist mindset, essentially raising him to be a suicide bomber. And on his 18th birthday he fulfills his "destiny". Should the parents get a free pass?Apparently, some here believe that the parents should be held responsible for their adult child's actions...