<<I admit nothing. You are the one who set the bar of appearing before the world court to ascertain legitimacy.>>
Fair enough. You don't draw any adverse inference against a country that refuses to submit its actions to the World Court's scrutiny because none of the big players will do that. However of all the big players, it is the U.S.A. only that pats itself endlessly on the back for its devotion to the rule of law and it was the U.S.A. that took the lead in the founding of the World Court. Therefore I find it particularly suspicious that this one country, supposedly so devoted to the Rule of Law, exempts its own action from the scrutiny of the court that it itself took the lead in founding.
<<I'm just wondering if that would be a universal requirement or only for those governments you disapprove of.>>
Nope, just the hypocritical bullshit U.S.A.. for the reasons stated above.
<<If being invited bestows legitimacy, the the US involvement in Viet Nam was as legitimate as it can get. South Viet Nam was a member of the South Asian Treaty Organization, modeled after NATO.>>
South-East Asian Treaty Organization (SEATO) was an organization bought and paid for by the U.S.A. and could confer no legitimacy on any government. South Vietnam was not created as a country, but as one of two zones of Viet Nam, the north half of which had a democratically elected Communist government led by Ho Chi Minh, and the south half of which was, by the treaty that created it, obligated to hold elections within a stated period of the separation, for national leadership. The U.S. government took over the sponsorship of the southern government from the French and encouraged it NOT to hold free elections, on the grounds frankly admitted by Eisenhower, that in a free election, Ho Chi Minh would have won 80% of the vote. With U.S. backing the former French puppets then declared themselves an independent nation and attempted to repress the will of their own people for unification with the north, ultimately of course failing spectacularly. They were never a legitimate nation, membership in an organization of U.S. puppet states and collaborators could not confer legitimacy upon them and there was no way that any invitation they extended could have any legitimacy at all, particularly when the invitation was to the very power that had backed it and encouraged it not to hold the elections that the founding treaty obligated them to hold.