I guess you have to ask yourself whether you want justice or vengence. And are they both the same thing. Let's say there is a convicted serial rapist. Do you want him to serve 30+ years behind bars or do you want him completely rehabbed in 2 months and back on the street? What if your daughter was one of the victims, how would you feel? What if your daughter was 10 years old?
My thoughts would be the same, I think. I want both, justice and vengence. Rehab him so that he would never even think of raping again, then sit him behind bars for 30+ years with all that regret and remorse we just beamed into his head.