@Zardoz,
When Hitler got to hell, he was greeted by the devil. The devil said boy have we got a place for you. Hitler said not so fast, see that guy over there, Jesus, he already paid for my sins. Besides the Christians did far worse they were into sadism and torture I just gassed the Jews. Do what Martin Luther warned you not to do, use reason. If Jesus prepaid for your sins, you might as well commit as many sins as you want the check has already been paid. Most human sacrifices had an accompanying ceremony to commemorate them. Jesus however was killed and his death only later became a sacrifice. Jesus was killed because his actions were treasonous and his popularity threatened the government. Jesus was a Jim Jones like cult figure. Jesu didn't die for your sins he died because he was a threat because of his cult following.
Making Jesus a sacrifice was meant to obligate his followers. Jesus died for you what are you going to do for him? The gift principal is one of the oldest principals known to man. Gifts were given to kings to curry favor with them. Today campaign contributions are given to gain influence over politicians. It works the ungodly greedy get massive tax breaks at most elections so much now that the richest man in the world pays no income tax.