I just think that viewing this as some new colonisation by the US is a mistake. To me this a Dane problem and we can ask where was the European support when the Falklands were invaded?
We need close military co operation with the US in reality and I understand Trump is an idiot but really is this a hill to die on geopolitically?
I would rather the US would just expand troop numbers in Greenland but if they desire sovereignty what resitiatance can Europe put up and the big question, is it really worth it?
British companies are going to suffer with tariffs and this situation could be solved by a climb down from Denmark and I think the greatest visit will be Danish pride.
It will be humiliating definitely but I think at this point you have to pick your fights and this a fight where the UK suffers needlessly.
I would rather incredibly sparsely populated Dnaish territory had a change of flag than NATO to be questioned at this point of world history.
Maybe ultimately the lesson will be that Europe has to invest a lot more in defence and that is the point Trump is trying to make (albeit badly)