Why do parents starve their children?

I watched an episode of Dr. Phil that showed of an eighteen year old discribing her abuse, that she was locked up in a closet by her parents she was chewing on bowls,biting wood from the door, laying on her feces and other things i rather not discribe. The neighbers tried to save that child including the police but  what was worse the parents sexully abused her and beat her like a punching bag around the clock the neighbers were not happy for what the parents was doing to the child, when the police arrested the parents the good people saved that child from abusive parents and that child was put into a good and caring home, but when the mother was brought to court to be put on trial for child abuse the mother did even shed a single tear nor did she say that she was sorry for what she did to her daughter, people would say that she was proud of what she did to that girl. A child should not be abused nor totured in a home of abusive parents that child diserves the right to be loved and cared by a loving family but not raised by a cruel family.

Why do parents abuse their kids?

When children are born in this world parents take care and love the child and help them find their way in life but not use their children as punching bags, when that child goes to school and sometimes get bad grades they show their report cards to their parents and when they show them the parents get angry at their child they kick their son or daughter in the stomach punch them in the face for no reason. Then when the child reach the age of the teenager they still get a beating every inch of their lives, but after words their parents say that they are sorry they will never do it again so that child forgives their mother and father, but they hit their children again and again thinking that the parents can do what they want to their child, and then they beat their child some more and says that their child diserves it then years later when a teenager reach adult age they try to forget their childhood lives but knowing that when you try to forget the past will haunt you for the rest of your life.