There are a couple of givens in family law. First, divorce, even an amicable divorce, is stressful. In fact, according to the commonly used Holmes and Rahe Social Readjustment Rating Scale, divorce is second only to the death of a spouse when it comes to stressful life events.
Second, people going through a divorce or dealing with a custody or support issue are not always at their best. Whether stress or anger or frustration or sadness, our emotions can get the better of us, and we can lash out. Lashing out physically is never acceptable. Lashing out verbally can get us into trouble, too.