This is a common thing throughout the Anglosphere (and presumably elsewhere)
For whatever reason, our far-right CHUD types will invariably act as American as possible, even when they are talking about "defending" Scottish/British/Canadian/Australian etc "culture" from (insert enemy here).
I have no idea why this is so prevalent though, I'm sure someone else has a good explanation for why this keeps happening.
It's true in Central America too but I think a lot of that is due to the US right-wing funding them and the presence of US Evangelicals. Right-wing nationalists that want a more independent foreign policy exist but they're outnumbered by the heavily pro-US bloc.
Do you think the Anglosphere does it because of the heavy presence of US soft power, particularly social media? Even the far-left in the Anglosphere seems to follow whatever the American left is doing.
It is most likely due to that soft power. We used to have our own book, film and tv industries, making our own media, but these days I don't think there's much of that at all, it's all netflix. Even speaking with people 5-6 years younger than me, they'll use American-centric terms like "candy" and won't understand Australian slang. American pop-culture has consumed our country.
I've heard it has happened in a lot of places, like the Philippines as well.