Empathy plays a very big role in the cycle of abuse. If you are traumatized and you haven’t started to heal your inner wounds, the chances are that you lack empathy – for yourself, and, by extent, for others. Such person is disconnected from his or her true emotions and lack awareness. There’s no empathy for yourself and no real emotional connection with your personal history and your child-self.
And therefore you feel no empathy for children – both for real children and inner children in grownups. And you lack awareness of what’s really going on in you and around you. Thus it’s not surprising that such person will unconsciously – and sometimes even consciously – hurt children.