Before epilepsy was understood to be a neurological condition, people believed it was caused by the moon, or by phlegm in the brain. They condemned seizures as evidence of witchcraft or demonic possession, and killed or castrated sufferers to prevent them from passing tainted blood to a new generation.
Punitive justice may not make sense without free will, but restorative and preventative justice still does.
At which point (if any) does someone deserve writing off as an asshole?