The jews dont worship God, they worship Satan. God repeatedly stated in the OT that the sacrifices were not pleasing to Him when they were performed by the unrepentant, and eventually decided that He had to do it Himself. The point of the sacrifices wasnt bloodlust, but to impart to the Hebrews that sin was a debt that had to be repaid (in fact, the word used for sin in latin is literally debt), and ultimately it is impossible to repay that debt for humans, and only through the sacrifice of Christ can our sins be forgiven.