Denmark's PM has stated very plainly that Greenland is not for sale.
So that should be the end of it.
Columbia also didn't want to accept the terms offered to build the canal in its Panamanian province. So the U.S. supported Panamanian revolutionary groups, and after Panama broke away from Columbia, made a deal with the new nation.
It's an old imperial trick. If a foreign government would do your bidding, install a more friendly government. Today of course, it's called a color revolution.
Denmark is not an independent country, having been a member of the EUSSR since the early 70s. It’s the EUSSR who is imperialistic here, encroaching on the US by proximity.
What’s your beef against the USA? Maybe you should go to DU.