I think it's about evolution.
At some point we are all destined to become/think of ourselves as a global community, but I also think it's still too soon though, and that until we all resolve some key differences that are still with us as a species, it's never going to happen without maybe destroying/unraveling the whole thing, or doing the exact opposite of what a global community should be, or should be doing, and then setting us back decades, or perhaps even centuries, from ever reaching this point again for a little while maybe, which might mean temporarily repeating some of the darker chapters of our history again temporarily, until we can come to this point again maybe, etc.
But the push against any kind of "nationalism" in any individual nations globally, does I think come from a genuine desire to evolve/change for the better though I think probably, even if it's a little misguided right now, or we are still trying to figure it out still right now currently.
But this is probably also a very, very fragile time/constant threat of a tipping point/reset point for any planet full of quote/unquote "intelligent beings" of a shared similar physical form though always probably, probably as old as the universe itself or this kind of existence/reality probably.
We'll either figure it out, or we won't, and if we don't, then we will probably do the opposite, and repeat some of the darker chapters in our history, until we can get another chance again after a little while maybe, because that's where we are at as a species right now currently.
Hopefully at some point we'lll be able to pull it off eventually, etc. Then "the stars" after that maybe, etc. Assuming we don't destroy ourselves, or this planets ability to sustain our lives between now and then, etc. Which would then set us back a really long time, if there are any of us left, or that are able to survive that kind of thing, etc.
We still have a lot of issues that will need to be solved/resolved between now and then if we're to be successful in it ever, etc. Key differences and extreme selfishness/self-centeredness, and all of that, etc. Being overly individualistic doesn't help with that either, etc, which is the most prominent in the west, or in western culture right now mostly, etc.
God Bless.