Animal sacrifices are widespread in the bible, dating all the way back to when god ordered Adam and Eve to kill an animal to make the first leopard print pimp suit and hooker pants. Sometimes it’s done out of sheer religious idiocy, as if god really gets pleasure from the flesh of dead animals. Sometimes animals are slaughtered merely to test god, in some macho my-god-is-bigger-than-your-god challenge. Other times bible figures sliced the necks of animals because they actually believed doing so would cleanse them of their sins. Even biblically this is stupid, because all cases of animal sacrifice for atonement take place in the Old Testament, before atonement actually meant anything. Death is death in the OT. It wasn’t until Jesus’ time that atonement made death something else. But when we look to the OT, what does it actually say about animal sacrifice?
But then the New Testament comes along, and Paul (or some other unnamed author) called all the Hebrews idiots for doing what the bible tells them to do. In Hebrews 10:4, 11 Paul is quite reasonable when he says “it is impossible” for animal sacrifices to have any impact on your soul. This is one of the few times I agree with Paul.