Greenland is serious. The U.S. has been trying to grab it for a century. They have influenced the native population for decades and will continue to stir anti-Danish sentiment. A classic regime change operation like hundreds of others.
Many U.S. newspapers who have lectured us on Ukraine's sovereignty for four years are relatively silent on the issue. The All-In podcast (now almost a pure Trump outlet) were in favor and suggested other land grabs.
The EU, stripped of its will and subservient, makes meek comments. Apparently it is fine that 2 trillion in minerals will go to the U.S. and they can buy them back from the U.S.