There definitely is an element of vengeance in capital punishment as well. "Eye for an eye". I am not fully on board with that, but, on the other hand, I canno

There definitely is an element of vengeance in capital punishment as well. "Eye for an eye". I am not fully on board with that, but, on the other hand, I cannot pretend to myself that I'd consider "Eichmann being hanged" somehow morally bad or evil. In a sense, he had it coming, like many of his peers. More recently, the people who raped and killed their way through Bucha, deserve the same treatment. But I can see that them hanging won't deter further butchers of next Buchas. People commit such crimes while feeling virtually sure that they won't ever be punished for them, and they are often right - too many war criminals expired in a luxurious bed at home. Notably, Stalin's executioners were never tried by an international tribunal unlike their Nazi counterparts, because the USSR won the war. If the butchers of Bucha were to hang, it would be mostly motivated by vengeance.