I agree with you Smash in the case of Jaimie Bulgar's murder a huge proportion of the blame rests with the parents. The way they raised their kids was deplorable but the difference being that those murderers were children themselves, therefore less culpable than two young adults.

In this case it seems that the 19/20 year olds were sexually motivated to carry out their sick act. In my opinion they have executed their free will regardless of their upbringing.

I don't have such a venomous response to any other crime. The Mayan justice system should be reserved for this specific crime only because the act they did is beyond comprehension and rehabilitation.