maybe there subconcious is trying to make there poor little ones suffer as much as there perceived memories of there own childhood...sad!
then they must be just taking out there frustrations in life on there kids and there's no excuse for that whatever!!
Sometimes.. it happen to me. If anyone had that experience watch out of their body language. Parents will get to you
it is a problem now as well as kids killing their parents and each other ,,,we are in a crazy world now and some take their fears out on their kids and vise versa ,,it is sad
Cruel to begin with.