This is an interesting article which speaks to some of the issues and problems with rehabilitation and is similar to thoughts on the effectiveness of probation and parole
After the Pittsburgh mass killing, many are wondering how to turn extremists away from violence and hate. But there is very little research, and even less funding, to make that happen.
— Read on www.npr.org/2018/11/06/663773514/is-there-a-cure-for-hate