Civilised countries put a higher value on life.

Thats why we have lower gun crime, fewer murders per capita and each and every country that abolishes capital punishment sees no increase in what was capital crime, making the deterrent argument dead in the ditch water.

So you are left with puerile revenge and excitement over seeing someone dead. The same argument that led to the crime in the first place in many cases.

This is usually the point where I say keep banging the rocks together...