Just not a good and convincing argument.
Of course not. It was only an assertion. Here's the argument:
There are many problems with the death penalty, the most problematic and dispositive being that, IMO, it is utterly unjust because it is double jeopardy. The “punishment” of the death penalty for the acts of everyone were totally paid for, punished, and condemned on the cross of Christ 2000 years ago. Jesus was punished and died for the very acts a criminal (or anyone) is put to death for. So the punishment of death is double jeopardy. Therefore, punishment is an illegitimate and unjust purpose in the penal system. The legitimate purpose of dealing with dangerous criminals is incarceration to protect society from danger.
Here’s a short list of answers to the excuses often used for the death penalty:
EXCUSE: The death penalty serves justice because it's an "eye for an eye."
ANSWER: Fair enough except for one problem: Somebody (Jesus) has already paid "an eye for an eye" for those criminals and their heinous acts, so unjust double jeopardy is in play here.
("God was in Christ, reconciling the world unto himself, not imputing their trespasses unto them" (2 Corinthians 5:19).
"And he is the propitiation for our sins: and not for ours only, but also for the sins of the whole world" (1 John 2:2).)
EXCUSE: Victims and their family are not justly served and have no closure.
ANSWER: Countless personal and professional examples testify to the fact that there is only one way victims of savagery can recover from the hurt and angst of victimization: forgiveness. Revenge feels good for awhile but does not relieve the pain.
EXCUSE: Protecting society.
ANSWER: You lock up dangerous criminals to protect society.
EXCUSE: It’s too costly to keep them in prison. Why should society have to pay for their incarceration?
ANSWER: Well I guess there is such thing as killing criminals for convenience, but let's take another tack which hits directly at our medieval penal system: prisoners should be productive and at least pay their way in prison.