Here's how I read that Greenland thing: Greenland: Oh, hey! We had to rescue an American from that submarine you've got lurking 7 nautical miles offshore, who faced an urgent medical crisis. Trump, caught patrolling an ally: EMergency! I'll send a sick boat that's in the sick bay.
Here's one of the first announcements of the rescue I saw. It seems the reason you announce this is for maximal embarrassment.
Tl;dr: Greenland announced this to humiliate Trump. In response, Trump posted a bullshit post, and most American outlets and far far far far too many people On Here posted it as if it had truth value.
@emptywheel.bsky.social What the hell was a US sub doing INSIDE Greenland territorial waters?

@Pamela1960 @[email protected] Under normal circumstances it's not at all unusual.

US subs would pass through the waters of Greenland normally on their way to the Arctic ocean from the North Atlantic.

It says something about the Republican administration that this is a thing that would even be questioned

@emptywheel.bsky.social
The USA should explained what this sub was doing there. I honestly never thought l would witness something like this. BABA (BUY ANYTHING BUT AMERICAN)