What if there was a new education rule, that in every country in the world children were not permitted to study their own country in school, but had to choose one or more other countries to study? And study every aspect of those countries, their history, geography, political systems, art, music, literature, language, environment, religious beliefs, flags.
Nothing to stop you learning about your own country from your parents of course, or from the media, or from books or films, this would just be a ban on formal school education about it. Think of it like sex education - religious conservatives hate the idea of children learning about sex in school, and always insist that it should only be taught by parents in the context of the home. Well how about applying the same idea to learning national identity?
In recent times schools have been forced more and more to be de facto cradles of nationalism, places where children become inward looking not outward looking. Under the guise of patriotic fervor children can complete school thinking that their own country has an exclusive monopoly on literature, democracy, virtue. That only the history of their own country is real, that other countries have no reality other than as they interact with yours. And arguments can rage about which version of your own country's history should be taught, which literature and art is suitable, when prayers should be allowed.
My proposal cuts through all that, and all of the protagonists who have agonized over school prayer, or visits to art galleries, or banned books, or flag displays, or military history, will be delighted that a solution is at hand. And many other advantages. If you go to war with a country you will understand why it isn't going so well. If you insist on increasing CO2 emissions you will know how this is affecting Africa or Pacific islands. If you are uncertain about how well your electoral system is working you will get some ideas from other democracies that can be applied to your own. And you will discover that other countries produce good books, movies, music, art, have different beliefs, have their own heroes and villains, their own economic imperatives, their own sports. In short you will discover that the world is a big and complex place, where people who are fundamentally just like you nevertheless believe different things and have different ways of doing things. Not a bad lesson for any child to learn at school.
Can't see that anyone could argue against this approach to education.