Hebrews 9 and 10 clarify the Atonement ritual of Leviticus 16. The author makes no mention of Satan, but says that Jesus bears our sins like the azazel goat.
The Day of Atonement is not fulfilled with the binding of Satan. Rather, there are numerous prophecies of God atoning for the sins of physical Israel.
The Day of Atonement is not about Satan, but about the complete cleansing from sins through Christ. The Passover is not a sin offering, but a peace offering.
The blood of Christ, a propitiation or appeasing force, the only means to satisfy God's pure sense of justice, is a testimony of God's intense love for us.
Man's estrangement from God is wholly man's fault. Atonement denotes the way harmony is achieved, making the entire world at one or reconciled with God.
God the Father does not take the minimization of His Son's sacrifice lightly, as some Protestant theologians imply with their cheap grace doctrine.
Moral failure compounds when self-loathing sabotages happiness. Only atonement can turn this depression around, providing the comfort of mental and spiritual health.
Human nature has a perverse drive to take risks, pushing the envelope, taking unwise chances, foolishly gambling away the future. Foolishness is sin.