show from the Bible that this is wrong
Penal Substitution
The Reformers agreed with Anselm that sin is a very serious matter, but they saw it as a breaking of God's law rather than as an insult to God's honor. The moral law, they held, is not to be taken lightly. "The wages of sin is death" (Rom. 6:23), and it is this that is the problem for sinful man. They took seriously the scriptural teachings about the wrath of God and those that referred to the curse under which sinners lay. It seemed clear to them that the essence of Christ's saving work consisted in his taking the sinner's place. In our stead Christ endured the death that is the wages of sin. He bore the curse that we sinners should have borne (Gal. 3:13). The Reformers did not hesitate to speak of Christ as having borne our punishment or as having appeased the wrath of God in our place.
Such views have been widely criticized. In particular it is pointed out that sin is not an external matter to be transferred easily from one person to another and that, while some forms of penalty are transferable (the payment of a fine), others are not (imprisonment, capital punishment). It is urged that this theory sets Christ in opposition to the Father so that it maximizes the love of Christ and minimizes that of the Father. Such criticisms may be valid against some of the ways in which the theory is stated, but they do not shake its essential basis. They overlook the fact that there is a double identification: Christ is one with sinners (the saved are "in" Christ, Rom. 8:1) and he is one with the Father (he and the Father are one, John 10:30; "God was in Christ, reconciling the world to himself," 2 Cor. 5:19). They also overlook the fact that there is much in the NT that supports the theory. It is special pleading to deny that Paul, for example, puts forward this view. It may need to be carefully stated, but this view still says something important about the way Christ won our salvation.
Theories of the Atonement by Leon Morris