No, it isn’t. You can fully believe in people’s ability to rehabilitate and change, while also being aware that not everyone rehabilitates and changes.

The needs of the perpetrator of a crime need to be balanced against the needs of society at large. This is why you get your license taken away from you when you drink and drive, or why you end up on a sex offenders register.

In this case, there’s a valid argument to be made that this person represents a danger to society, and the need to protect/inform people from him outweighs his needs.