My point is that there's no such a thing as "liberation", since interventions are known to be used as a pretext to project power. Calling it "liberation" is an euphemism for what it really is. No nation should meddle in other's internal affairs.

I strongly disagree with that. In my opinion, the sovereignty of nation states does not have priority over all other concerns under all circumstances. But this is certainly a very complex issue.

And that's why countries have armies. Sovereignty is not a right that is granted by the UN Security council it's taken and held by military force.