I'm somewhat floored. In what way do you find a bunch of Americans expressing pride in their country like that toxic? Good for them. I don't find it objectionable any more than us Brits signing Rule Britannia at the end of the Proms, but I know some do.

I have to admit though that once on holiday in Germany, while siting in the ruins of a castle overlooking the Rhine at night, myself and some Brit and American friends of mine burst into a rousing chorus of Deutschland Uber Alles, much to the dismay of our German friends. So perhaps I have an odd sense of humor in this respect. And no I'm not some kind of proto Nazi. I also once memorized the words to much of the State Anthem of the USSR, and knew how to use them, but alas it's since largely slipped my memory. Life's too short to spend it walking around with a stick up your arse about these things IMHO.

Nationalism in general is toxic. I firmly believe that nations are a deadly plague and that they should not exist.

Well, it turns out that nations were better than what preceded them at keeping their citizens safe. I even suspect (but I am not a historian) that they were better at cutting down on wars (though the wars were more serious when they happened).

So if you want nations not to exist, the burden is on you to come up with something better. "No nations" can look like what used to be Somalia, or what used to be Afghanistan.

Well, when you change the world with a huge leap in technology, you can celebrate it how you want.

It's just a cultural thing, it doesn't mean anything weird.