punishments should never be based on emotions and feelings. That's one of the reasons we have the whole system in the first place.
What about victim impact statements? They're given during sentencing, so emotions must have some use in punishing. Maybe to determine extent of harm?
I can see not letting the victim's family determine punishment - since they'll punish unjustly/disproportionately or we'll get too much variation among punishments to consider it fair/just.
But aren't emotions (guilt/indignation) like value-detectors in the world, they tell us when something wrong has happened and that punishment is appropriate?
the most important thing is to not give him any chance of being in touch with the outside world so that he can't influence others to do what he did.
But aren't influences of the outside world the reason why the wrongdoer acted?
If someone else is wired for wrongdoing, then it seems that the world, not the direct influence of past wrongdoers, leads to crimes.