Greenland is about rare earth deposits.
Rare earth deposits are necessary for electronics and other tech.
Our own EPA, writing its own rules and laws, has managed to shut down nearly every rare earth mine and manufactory in the US.
China has a near strangle hold on rare earth production.
China was attempting to move into Greenland and had offered to build for them, free of charge and no strings attached of course, a huge international air hub.
That’s one of the ways China takes possession of countries. Debt by “free” construction, move in their own people, take over from the inside.
The Greenland deal is a defensive effort and a necessary one.