Giok, history is usually taught with one eye closed, as you suggest in your post about the Magna Carta. I was raised in a (at the time) largely Spanish area of New Mexico. The Spanish conquest was emphasized, and we had a book on New Mexico history. The Mayflower, pilgrims, etc. only received incidental mention, and they remained foreign to most of us. In our last year of high school we got a course in world history (optional) where items like the Magna Carta came up. I think we were given the idea that the rights of the average Englishman were protected by that document; only in university did I find out that only a bunch of lords gained rights, and that it was a long, long time before the average guy got a fair shake.
It's fun to play What If? In WWI, if the Germans had won, a German relative of the King would have gained more power and the headache of a bunch more colonies would have descended on him. The Irish would have been free. German would have been taught as well as English in all British schools. A nonsensical game but fun. If the English had posed no resistance, a lot of people would have remained alive- but after a generation or two, given the evolution of thought at the time, would there have been any loss of liberty? Or just that bugaboo, pride? Would the favorite English song be Gott Mit Uns? A Bogleite.