[jjk166]

If managers are disagreeing in public, it is either because they never agreed to something in private beforehand (poor communication) or because the couldn't stick to the agreement (lack of professionalism). Such disagreement is thus a symptom, not a cause of management problems. You shouldn't be undermining eachother with arguments, but forbidding such arguments does not fix the underlying issue, it only hides it and lets it fester.