Tension between Jesus teaching and practicing a ministry of love and that Jesus died a criminal's death. Three options for deciding how to interpret the relationship between these two:
The logic of retribution resolves the tension by minimizing the significance of Jesus's teaching and practices. For salvation only two points matter: (a) Jesus was sinless and (b) Jesus died a sacrificial death and therefore Jesus's crucifixion is the means to achieve salvation.
The other extreme, all that actually matters is the truthfulness of Jesus's message of love.
The approach taken in this book: Jesus's crucifixion is crucial for how we understand the Bible's salvation story, but not because it adds a needed element that makes salvation possible. "Rather, Jesus's crucifixion illumines what is at stake in God's efforts to bring healing to the world, what forces oppose these efforts, and how those forces may be overcome." (AK location 2573)