That's not true what you wrote. It's completely simple to be saved. Back in the Old Testament Jesus hadn't come yet so he required animal sacrifices. In the New Testament (which had even be predicted thousands of years earlier in the Old Testament)Jesus came. he became the One and only sacrifice we would need for our sins. His death brought on the atonement for our sins. He said in Romans it's a FREE GIFT. all you have to do is receive it. To be saved the book of Romans tell you to confess your sins. Repent of your sins. Turn away from your sins. Ask Jesus who is the ONLY intercessor to the father to forgive you of your sins. Then it says you will be with him in heaven. That is how simple it is. He also says that when we get saved we cannot lose our salvation. Jesus said you are in my hand and I am in the father's hand and no one can pluck you out. God doesn't change his mind just because we sin. He loves us. He promised us. Christianity isn't a religion it's a relationship.