There is so much attached to national identity, most locals never realize. They are provided with a couple of “default options” for beliefs and values, and they pick one.
Being free of that is so liberating, if you build your system of values, the local leftist (or whatever) gathering offers nothing in comparison. But they always think otherwise.
I think this perspective does not come out of emigrating from one country to another: you just pick a “home team” and stick with it. But when you have moved three or more, that a totally different story.