The same way that Stuxnet destroying Iranian centrifuges was an act of war ?
I really don't understand relationships between States.
Of course, I'd be interested to see how those assets were set up in the first place - my bet would be during a non-rights-respecting period of colonialism.
How far back do you go? (Serious question).
As for nationalisation is certainly a violation of rights do you hold that all eminent domain is a violation of rights? IE if the government wants to build a road and uses compulsory purchase orders it's a violation of rights?