I believe forgiveness is a good thing. I only wanted to make a very clear distinction between the spiritual response to sin (forgiveness) and the social response to crime (prosecution & punishment).
Sin and crime are not the same thing. For example, for many Christians, it is a sin to abort an unborn child. This is not a crime in the United States. For Rasfarians, smoking marijuana is a sacrament. For U.S. citizens, it's a crime. For a Muslim living in Saudi Arabia, it is both a sin and a crime to drink alcohol.
I do not believe I have the spiritual authority to forgive Karen Zerby for the role she played in the abuse of a generation of children, the defrauding of donors, the conspiracy to cover up the crimes of people like Sam Perfilio & Stuart Baylin, etc. I have only been indirectly injured by Karen Zerby's behavior, and I am not God.
When I pay taxes to keep one of her well-known SG victims off the street and safe in jail or in a psychiatric hospital, I believe she has incurred a debt to society that has little to do with forgiveness and everything to do with social responsibility for unpunished crime. If I forgive her for the psychological and spiritual destruction of the children who grew up in her household, does that mean she has no debt to society? No. It only means she has no debt to me personally for the offense she has given me by injuring children.
In its most basic form, forgiveness is a conscious decision act not to take personal retribution for an offense. I may pray for tenderness, mercy & understanding because I also want to heal, but I don't believe these things are necessary for me to say, "I forgive Karen Zerby" and mean it. All that is necessary is my decision NOT to take the law into my own hands by blowing her brains out. This basic forgiveness does not mean I think it is unnecessary to make Karen Zerby answer for her crimes in a court of law.
I don't believe forgiveness means I should be someone's doormat. I may forgive a man 77 times 7 times, but I'm a fool if I allow him to hurt me that many times. I may feel compassion toward Karen Zerby for being such a pitiful excuse of a human being, but I'm socially irresponsible if I don't support prosecuting her for crimes against children.