A lot of people think the justice system should be about revenge and not rehabilitation.
Anecdotally, I have spoken with so many people that believe criminals should permanently lose their human rights and never be accepted back into society again regardless of crime committed. It is actually legitimately disturbing how many people froth at the mouth at the idea of a government-run institution that enacts petty revenge on its own citizens. I have had numerous people give me a look of absolute disgust when I tell them that justice systems should rehabilitate people so they can enter society again safely and with helpful resources.