Animal Sacrifices and the Temples of Gore.
Its interesting that almost all the religions of the world decided that the best way to appease their Gods was to butcher hapless animals to them. Apart from reasons of piety, I suspect it had something to do with guilt. Taking another animals life for food may have looked a bit selfish. Therefore as in most things, men decided why not do it in the name of God? You get to eat the meat and God takes all the blame for the blood and gore.