THe problem is you speak so inaccurately. To blithely assert "larger facilities should be nationalized within a stronger United Nations" shows a great sloppiness of thought or speech or both.
General Motors, for example, should not be nationalized, despite being a very large facility. Perhaps you think Heathrow should be nationalized because of its size? Or do you actually mean only those large facilities whihc are part of the common infrastructure of society, likes the roads and the postal system, for example?
We have two companies in the US which are almost as alrge as the postal system--UPS and FEDEx. Neither one of them should be nationalized for any rational reason.
PErhaps when you think through what you mean, and take the trouble to say as much in clear language, you will not be thrown back on the barricades of vague self-defense.