Refusal to hand over Greenland.

(I'm not saying it's plausible, just want to explain the rationale.)

It does feel like we're on a slippery slope though. Normalizing and supporting the violation of international norms because 'they were bad guys and deserved it' is like turning a blind eye to corruption when its people you agree with. It doesn't lead anywhere good in the end.

> Refusal to hand over

Technically correct but slightly loaded phrasing. It implies the USA is in the right. Denmark is /defending/ itself and its territories.