The tradition that He was writing the secret sins of the mob has always been a fascinating idea to me. We obviously just don’t know, but I’ve always found it interesting.
Whatever He wrote, and for whatever reason though, you’re right that He basically interrupted everything. He didn’t play into their game. He denied the bullies, and broke them–leaving them empty-handed (quite literally, as they all dropped their stones).
It is an awesome story of how God’s mercy interrupts the world.
You also mention how the mob was actually in violation of Torah, which is very important. Torah required both guilty parties be present, and further, they were to be tried before the court (Sanhedrin). Where was the man? Why wasn’t he being charged? Where was the court? The mob pretended this was justice according to Torah, but they were nothing more than a lynch mob.
Jesus denies them their game. Jesus turns the tables on them, their hypocrisy on full display. Mercy interrupts the world’s perverted and false sense of justice, and brings real justice: When Jesus says “Neither do I condemn you, go and sin no more” to the woman, that isn’t just mercy, it’s justice, Jesus restores the woman and blesses her with a new life to live.
Justice isn’t always “punish the bad guys”. Justice restores what is lost, it mends what is broken. Justice is about setting wrongs to rights, making things right. Jesus makes things right here, not by condemning–but by showing the guilt of the hypocritical mob and by giving mercy to the woman. With the benediction, “Go and sin no more”.
“Go and sin no more” too isn’t “you better watch yourself” it’s a release. It reminds me of the Dismissal at the end of the liturgy (where the pastor gives the benediction and the sending of the Faithful). The woman had an encounter with Grace and is left changed, transformed by the encounter, her life is different now. She is no longer a slave to her old ways, but a new person having encountered the Son of God face to face. And so she can go back out there with a new life, one not identified by her sin, but by the mercy and love which she has found in Jesus.
In this way WE are the woman caught in adultery. Each of us is that woman, having been living lives of unfaithfulness and sin, defining who we are; and then Jesus finds us on the ground. The Law does indeed justly call us sinners, the devil with his flaming arrows ready to be hurled upon us, the world’s perverted ideas of justice and broken virtues, and Jesus turns to us, grants us mercy, and then changes us by that encounter. “Go and sin no more”. Not because we are perfect. Not because we will become impeccable–but because our lives are now to be defined by mercy, by forgiveness, by the love of God in Christ Jesus our Lord.