Just because one reduces an article short of writing an in-depth book doesn’t mean that one does not understand the subject’s true complexities. All that you say is true. Nothing in history is clearcut. It has always been every man for himself with general alliances constantly forming and breaking down — today’s ally is tomorrow’s enemy.
As Eric Hoffer said, history is played over the heads of the masses by the best and worst of society. Most of us are just sweep along for the ride.