The concepts of sin and redemption are baroque and roundabout in the extreme. It is supposedly god who decided that he couldn't tolerate certain things, then made humans such that they can't help but be intolerable to him. Then he created a Rube Goldberg mechanism -- substitutionary atonement -- to resolve this self-created problem. Then, he hid himself as well as any evidence of himself, and demands that people believe in their need for atonement and reconciliation with himself, based on nothing but blind faith. At the same time, he expects us to reject countless other demands for credulity -- from other faiths, from political ideologies he evidently doesn't approve of, and so much more -- even when they are just as specious as god-belief. Finally, you're expected to hold fast to your religious faith by sheer will power, devote tremendous time and energy and money to your faith, looking forward to being repaid for it all and comforted and made whole AFTER YOU'RE DEAD.

Indeed! As my avatar said, in The Age of Reason (1794), "Any system of religion that has anything in it that shocks the mind of a child, cannot be a true system." Few systems of religion are as shocking to a child as the Christian system.