God created man in his image...uh, well kinda.
Man turned out less then expected...a big dissapointment.
God decided these are no good, got to get rid of man. Back to the drawing board.
Jesus said NO WAIT DAD! Can I have 'em?
God said, well ok son but, its gonna cost ya. How bad do you want em?
In a nut shell, Jesus bought us from his father then mapped out a plan to bring some of us back to perfection over the next several thousand years and live happily ever after.
Maybe God sold us to his son then went on to try it again elsewhere, there's another planet somewhere with actual perfect humans living in a paradise. Watching us f%%kups.