The punishment is supposed to be a deterrent for crime. There are 2 camps: Ones that think of jail as a "correctional facility" (a place to fix broken people),

The punishment is supposed to be a deterrent for crime. There are 2 camps: Ones that think of jail as a "correctional facility" (a place to fix broken people), and ones that think of it as punishment, justice for a crime. No need to bring religion into everything. Punishment for "crimes" existed before christianity, friend.