I believe the culpability of this sin mainly falls on the shoulders of the man. Especially then, when women were in such subjugation to men, in general. The men attacked the woman, but, I am sure they were all guilty of this sin in one form, or another.
Is that what was written? Perhaps they realized that, they too, had committed adultery in one way or another and deserved the same fate.
I believe Jesus was saying, in not so many words, that what she was about to undergo was unjust, not deserved according to her part in this sin. IOW, she was not the one guilty of the mortal grievance of this sin.
I often reflect on this passage when I am praying outside the abortion clinic. In this culture, these girls are seduced by the guys, then made to deal with the consequences while they go scot-free? I’m willing to bet God has a different perspective on it.
I have taught my boys that a girl’s innocence is something belonging to God, and that, if they rob her of it, they have robbed directly from God, and that they will answer to Him for it. That they must have the blessing of the Church, which is basically permission from God to have her, under its parameters. I hope they find girls who agree with them.