“The law specifically called for the stoning of the woman caught in adultery. Jesus prevented them from following this law. Was that a sin?”
The man was supposed to be stoned to death under that same law, yet he was nowhere to be found in that story. The mob dragged only the woman out to be stoned. Jesus didn’t break the Law of Moses: He condemned their hypocrisy and then told them to cast the first stone if they had never sinned.
It’s likely there were a number of adulterers in that crowd, as they all walked away.
I agree that both were the man and woman were both guilty, but she was still subject o the penalty.