There are loads of NATO countries that will not assist the US in this case because NATO is a defensive alliance not a "this country responded my armed aggression, let's strike them" alliance.

If there was such a thing of an european politician that doesn't just do what USA tells them…

How about Denmark?

Donald Trump has made it very clear that the US should be looked upon as an adversary.

Denmark in greenland are as much colonizers as USA would be.

There were no people in Greenland when it was settled by the Norse in the 10th century. The current Inuit population arrived after the Europeans in the 14th century.

The norse didn't "settle", in the sense that they all died off before the current inhabitants.

Article 5 doesn't count since the US very clearly started the war. Even the NATO articles recognize that Iran has the right to defend itself.