I can entirely understand your valid qualms about political unions, but your thesis above is patently untrue. Real world examples of cultures (as diverse as any in Europe) that have been successfully fused include the United Kingdom. When peoples' economic and political aims align so that a union makes them stronger, richer and more peaceable, they tend to accede to the idea. This has happened from the first tribes onwards.
Your nation state concept is merely one of the more enduring plateau points.
Bookmarks