As our representative, Israel and her leaders were not merely envious of Jesus at a human level, putting him to death to vindicate themselves in some human conflict. Rather, Israel very clearly put God himself on trial, on behalf of the whole world. Jealous of God’s greatness, holiness, truth, righteousness, wisdom and beauty, and seeking to establish their own, they put God on trial, declared him to be guilty, and executed him. Therefore, even in purely Girardian terms, Jesus’s death is not simply a transcendence of human conflict and sacrifice by the death of an innocent man, but it is actually an attempt by all of humanity to render judgment for mankind and against God.
It is a failed attempt: Jesus’s resurrection vindicates God decisively in the conflict between God and man. All mankind is shown to be condemned because of the actions of Israel their representative.
The truly amazing thing is that we who are thus condemned can be vindicated — through Jesus’s death and resurrection! In a sense, simply by agreeing with and rejoicing in Jesus’s vindication, God extends to us the great gift of Jesus’s own vindication and resurrection. This is where our understanding of the atonement as sacrificial and substitutionary comes into play, as John goes on to explain Caiaphas’s unwitting prophecy in verses 51-52. Jesus died for the sins of the world at the very moment the world’s sin and rejection of God had become total and complete. Our mediator is no longer Israel, but Jesus himself, the true Israel. Both Israel and all nations are invited to feast in God through him.