This part of Trump's voters would back anything he'd say or do, regardless of relation to reality. Luckily, the oligarch owned press is nearly omnipresent, and does not report honestly or completely on Trump, his behavior, so that fraction of voters can keep on believing in Trump as God King.
But the oligarchs would probably not be happy about a devastating trade war (I guess some are happy to buy up all assets and move to the _post-democratic age_ or whatever). So, why aren't they trying to stop the Greenland nonsense?
I think you mean "oligarchs" for they. I have no answer, I'm just a peasant in today's America. My economic interests absolutely do not align with oligachs'. I expect the oligarchs as a class don't think they'll personally be too handicapped by trade wars, and see some way to make more money out of it. Maybe Trump has promised them fiefdoms in a fragmented and demoralized US.
My specific knowledge does not allow me to say why they aren't (or are, behind the scenes) trying to stop the Greenland nonsense. It seems likely that Trump has promised them a slice of the extraction wealth, or that the oligarchs as a group don't see much trouble arising from a Trump takeover of Greenland, so they're just letting him do it rather than annoy him, or his easily angered base.
But the oligarchs would probably not be happy about a devastating trade war (I guess some are happy to buy up all assets and move to the _post-democratic age_ or whatever). So, why aren't they trying to stop the Greenland nonsense?