I can see it now...child rapists and pedophiles and serial murderers will no longer be punished, they will be given drugs and released into society. Anyone who would support such a thing has NEVER been a victim of crime.
Forgiveness is tough, but it's required by your faith. Can you give me a reason, based on Christian principles, for punishing someone whose mental equipment is observably defective? I will grant that we have limited knowledge of the brain at present, but history suggests this is temporary.
Have you ever considered there might be a reason why god forgives us?