The US Constitution is the governing document for everything the US does. Theft is not included.
To the victor go the spoils, if we backed the wrong horse it is hardly an excuse to involve ourselves or allow theft that weakens our international standing. That is the ultimate result, nobody anywhere will trust us if we start stealing from them if they do something we don't like.
It is not our place to punish other countries, or nation build, or police the world, clearly too many people have learned nothing in the last 100 years or so.
Again, backing the wrong horse comes at a cost, that is not justification for theft.