Jesus took the theology of His day and turned it on its head. He expanded on it and breathed new life into it. Should we do the same? Ask Hank Deuteronomy, who still attempts to run his family via Old Testament law.
Atonement was once gained by the sacrifice of a prized animal. It showed that the guilt and the sinful deed had been dealt with. However, the continued slaughter of valuable animals would not change the heart of the people.