Earlier quoted context omitted.
You're forgetting several factors which undermine your analysis: 1. Denmark does have allies; they're not completely alone, and they're not completely helpless. 2. The US has a track record of invasions, but not one of successfully pacifying states. Resistance works. You're using the same simplistic logic as Russia invading Ukraine; you can't just compare population numbers and guarantee an immediate victory. There's…
The US is very good at turning a functional state into anarchy, razed buildings and infrastructure, and lots of death. It doesn’t really matter if the US can pacify Denmark after its population gets decimated. It’s pure posturing to pretend any government in the EU or NATO countries will do anything to resist.
Do you really think NATO wouldn't defend a NATO country being invaded? It isn't USA they are fighting against, it is just Trump, and that war wouldn't continue for many days before the congress decides to end it since USA doesn't want it. So I don't doubt NATO would go to defend Denmark there, since they know USA would remove Trump if they did.