Many of us can't understand why people hurt kids - we think abusers are just low-lives who must be punished. Certainly, the personalities of a small number of people may predispose them to do nasty things to children, though that's often because of what happened to them as kids.
These individuals need to be identified and, where possible, helped. But, above all, children need to be protected from abuse.
Harmful parenting, including raising children in violent homes, may increase the likelihood that children will grow up to abuse their children. Even very young children are affected by witnessing violence in their homes. In some cases, they repeat as adults the abusive behaviour they have seen and experienced.
But it's more complex than that: abuse and neglect of children and young people happens in wealthy families and communities, but it's more likely to happen where there is poverty, poor housing and unemployment.
One of the reasons that we have higher percentages of Maori and Pacific Island children in our child abuse statistics is that significant numbers of Maori and Pacific Island families are poor. As Child Youth and Family stated in its submission to the ministerial inquiry: