He OUGHT to have been held responsible and also WAS held responsible, so idk what to tell you. Also OP is right, he's not a skinhead murderer. Also it turns out apparently he didn't actually commit any crimes so "shitty parents" isn't even necessary as a defense.

Now you are also saying he shouldn't be held responsible. Regardless, if somebody says a person "shouldn't be held responsible for that crime," I'm allowed to say "yes they should" and that doesn't depend on whether the person was convicted of the crime. It's weird you're debating this idea.