It belongs to the people who live there. While you may think places like Point Roberts should be forcibly moved to Canada, or Ceuta should be forcibly moved to Morocco, I'm of the opinion of self determination, as is the global view based on the United Nations, who recognizes self-determination as the right of all peoples to freely determine their political status and pursue their economic, social, and cultural development
That's the same, whether it's Gibraltar, Scotland, Cornwall, the Canary Islands, Ceuta, Taiwan, Falklands, Cyprus, Texas, Point Roberts, Crimea, Canada, Greenland, etc etc.
We can argue about the thresholds needed, the length of time of residence ("squatters rights" etc), the minimum size of a given area, but the principal remains.
That's the same, whether it's Gibraltar, Scotland, Cornwall, the Canary Islands, Ceuta, Taiwan, Falklands, Cyprus, Texas, Point Roberts, Crimea, Canada, Greenland, etc etc.
We can argue about the thresholds needed, the length of time of residence ("squatters rights" etc), the minimum size of a given area, but the principal remains.