Animal sacrifice is to my mind a pagan concept, how it worked its way into the Israelites claiming God told them to do it, that's a good example of something I think may have been made up by man, only hearing what they wanted to believe. Jesus was claimed to end animal sacrifice for the Jews, but scholars say it didn't totally end for another 800 years, The buddha preached against killing animals, and today Hindus say the buddha was responsible for Hindus ending animal sacrifice, although its still going on in Nepal every 7 years by some Hindu cult, thousands of thousands of animals slaughtered and only a few actually used for food.