For example, should we bring back the terrible torture and execution as punishment of the law? Like electric chair, guillotine or even crucifixion?
Why? These can bring justice against mass murderers, traitors, torturers, rapists. Therefore justice isn’t it? And it helps to scare potential criminals from doing crimes? Right?
Also to disrespectful kids, the can shamed hard don’t they? Is it alright?
No, that would not be a good idea.
Inflicting cruelty on another human being is not really an act of justice, because it cannot possibly restore what has been destroyed by the criminal in question.
Punishment has, essentially, three functions: (1) the reform of the person who has committed the crime, (2) the protection of society from further damage and (3) repairing, insofar as it is possible, the damage caused by the crime.
Punishment does, of course, have a deterrent effect, but that effect must be subordinated to the common good and (to the degree that it does not conflict with the common good) the good of the criminal. (Part of the reason, after all, that we do not wish for persons to commit crimes is because the crime damages the
perpetrators, in addition to the victims and to society as a whole.)
Inflicting a cruel punishment on a criminal would do nothing to protect society from
that criminal—a sufficiently long jail sentence is enough for that purpose—and it would certainly not be a help to reforming the criminal. Still less would it repair what has been damaged by the crime.
Only in the most extreme of circumstances can a penalty of death be applied: when the system of prisons is unable to restrain a criminal from committing further crimes, which is not really an issue in developed countries. Torturing a person to death, however, would accomplish nothing.
Making the punishments more cruel would undoubtedly have something of a stronger deterrent effect; it can hardly help that. However, it would not stop crime from occurring, and it would do nothing to restore what the crime has destroyed. Just how much more deterrent such cruelties would be is hard to quantify.
Protecting the human dignity of the persons involved (even those who have committed crimes) is always a higher priority than a possible, but nebulous, deterrent effect.