punishment, in all cases, must be based on harm caused
instead today punishment is based on righteous indignation moral posturers feel
and they can feel indignation over anything for example a woman not wearing a head scarf or you eating pork or drinking alcohol and on and on
the problem is the average person is a dog, possess no intelligence and only knows how to bark
it is easier to kill them all than explain anything to them which is why mass murderers do it