A child isn't born evil? What proof do we have of this?
It has been researched for years by academics and studies show that children from a bad parental upbringing and social background play a massive factor. There can be no doubt those two were beaten, abused and lived with parents who were alcoholics, allowed them to starve during the day so they could get drunk.
What kind of a life is that for a child?
In saying that what they did was evil.
It is the same with animals. People teach animals, like dogs to be wicked and viscous. It is the same with children in my opinion.
How many criminals have came from broken homes? Who have been beaten or abused? A lot of paedophiles themselves were abused when they were young.