Ever been on an Indian reservation? By all rights they are considered sovereign nations also. But I will stand corrected though considering history.
Yes I have been on an Indian reservation.
Greenland’s population is 56K and is 88% Greenlandic Inuit (including Inuit-Danish mixed), 12% Danes and other European. Not quite sure what your point is unless its the Inuit.
Its the strategic location & keeping China out! China would flank us in the North Atlantic.