The courts are filled to overflowing with cases that exemplify that kind of growth in our present society. And, who will you argue with when your team is the only one left. They research out the pros and cons in such a way that all the members are able to fall into a unity without any arguements. In unity they can pursue a mutually satisfying goal and its objectives. There is a lot we can learn if we can stop choosing sides.
Some persons seem more skilled in the art of argument than others.
Now you say that arguing is bad and we should stop it because it leads to dissention and divisiveness. There is a lot we can learn if we can stop choosing sides. However, if someone is arguing and doesn't subscribe to the same opinions, then they are promoting disunity and are on the road to bloodshed that you described. No, that's a misinterpretation I often relate with people who share my opinions. And, in the best of all conditions, we are able to doubt our own beliefs in order to seek more satisfactory knowledge.