Sorry to tell you but NATO IS the US, not France nor the Brits will do anything against the US.
But yeah, let the people of greenland decide and not like spain with the catalan independence movement.
I'm sorry to tell you, but the world is actually larger than the US, regardless of what your current media is trying to tell you. If the US actually dared to attack Denmark, an ally, I'm fairly certain France and The UK would stop being allies to the US, because suddenly "ally" doesn't mean anything anymore.
Let me tell you since you think i am from the US, i am not.
>France and The UK would stop being allies to the US
No they don't because there's one other choice and that's china, the right of Denmark to keep Greenland is simply not important enough in a multi-polar world.
>bureaucratic center being in Belgium, and military headquarters also being in Brussels
Yes and you can bet that Belgium would rater lick Donald's boots then help Denmark.
As mentioned, I'd love to see another survey from this month. My guess, at least based on talking with some acquaintances who are Danish with ancestors in Greenland, is that many now realize that "independent" isn't a realistic choice, given the current circumstances. So it really is between "Denmark with the protection of NATO" or "US with the protection of US by itself".