From a slightly different perspective, which I gained from my career, we now know that exposure to domestic violence really has a huge impact on children. It's almost to the point where it's likened to fetal alcohol syndrome. They know it's affecting the serotonin levels in the brain. The serotonin levels are basically burning brain cells because of the constant fight-or-flight response in the children.
They can't control that or turn it off. Those kids tend to grow up to be more violent if they have already been socialized in a violent community. You can see how this thing just keeps expanding.