I wish that one day all borders in the world were like this.
[1] Or at least an overwhelming majority of people.
This is really small potatoes.
Frankly, if he doesn't get rapped on the knuckles it's a guarantee that other folks will try the same thing.
Borders should be changed via treaty and diplomacy not by some un-educated moron deciding to take matters into his own hands. That only encourages border conflicts.