Mark Bridger - Revenge - Spiritual Damage.

'Jail is too good for Mark Bridger, he should suffer': April's grandparents call for death penalty for child killers.  Mail On Sunday.
People should never have a need to feel vengeful when a friend or relative is murdered in a properly ordered society.
In any society where punishments are clearly inadequate - this will promote feelings of revenge - and there can be little surprise.
This is a double whammy because, apart from the loss of a loved one - as with April - you come into direct conflict with what God has pronounced that your attitude must be.
Only a perfect God is permitted revenge but He has given society the task of administering justice.
When society fails its portion of this, the knock-on effects to the individual are almost inevitable - and spiritually damaging in the worst possible way.
Sadly, there are many who are unable to distinguish between justice and vengeance.
As a quick rule of thumb, justice is neutral but feelings of revenge are personal.