Because those would be breaking up the unions of those countries. It's no different morally or philosophically from Switzerland leaving the EU.
Say what? Switzerland isn't in the EU, how can it leave?
It has treaties, but not membership. That doesn't make it "leaving" if they annul the treaties.
Say what? Switzerland isn't in the EU, how can it leave?
It has treaties, but not membership. That doesn't make it "leaving" if they annul the treaties.