A word about revenge, punishment, turning the other cheek…
I, as an individual, have - in a civil society - no recourse in terms of exacting personal revenge against someone who has committed a heinous crime against me or a family member. Period.
On the other hand, the civil authorities have a responsibility and a duty to make sure that the criminal doesn’t do it again. If it’s a “capital crime” (normally punishable by capital punishment), the government has the reponsibility to exact the punishment called for in the code of laws.
I, as an individual, have an obligation to forgive. I, as an individual, have no right, however, to let the criminal free to repeat the crime against others. I must / am commanded by Jesus, God the Son of God, to forgive, to turn the other cheek.
The civil authorities have an obligation not to fool themselves by allowing criminals to “game the system”. [This seems to happen a lot.]
No one is entitled to revenge. Even the idea of “punishment” is suspect. But in the case of crimes, the civil authorities need to make sure it doesn’t happen again. Someone who has murdered before has demonstrated that they are not intimidated by the potential for incarceration / removal from polite society. So they need to be removed. Such removal may be regarded as “punishment”, but “if you can’t do the time, don’t do the crime.”