For my first submission I bring you Kaparot, the Jewish ritual of sin absolution. Basically you bow down while a man waves a live chicken around your head, supposedly imparting the animal with your sins, then killing the bird and eating it later that night. My first concern here is for the chicken. This seems like a shitty deal on his end, no matter how spectacular the sin was. The Christians had Jesus to die for their sins, and the Jews have poultry for the same purpose. But only one Jesus had to die for all humanity, while the chicken is only good for one man's annual sin accumulation. It seems to me that if you don't want Jesus/Chicken to have died in vain you should put more effort into committing sacrifice-worthy sins. Best homework assignment ever!
It is worth pointing out that these rituals are only examples of how the faithful treat each other, not outsiders. They save far more horrifying practices for us non-believing heathens and infidels. But that is a post for another day.