Why do opponents consider the death penalty disproportionate for crimes that do not involve killing?

Opponents of capital punishment argue that applying the death penalty to crimes that do not involve the loss of life is fundamentally immoral because it is wholly disproportionate to the harm caused by the offense.1

This perspective emphasizes that the severity of the punishment must be balanced against the nature of the crime. When the state imposes the ultimate sanction of death for non-lethal offenses, it is viewed as an excessive and inhuman response. For instance, in the 2008 case Kennedy v. Louisiana, the U.S. Supreme Court ruled that the death penalty was an unconstitutionally excessive punishment for the crime of child rape, affirming that the penalty must be proportional to the gravity of the offense.21

Beyond the issue of proportionality, abolitionists argue that using the death penalty for lesser crimes undermines the moral authority of the law by legitimizing the very act—killing—that the justice system seeks to repress. They maintain that justice should be pursued through means that do not involve the intentional taking of human life, which they consider a violation of the condemned person's fundamental right to life.13