And that is half the problem: the use of ettiquette in the international community has become over-rated. Personally, I would appreciate some state leaders and representatives just telling it like it is. Hence one reason I like Bolton as much as I do.
Then dropping a bomb or two, just to emphasize their point. I personally like "Gunboat Diplomacy", when you have strong adults running the show.
They do not have to like us; they must fear and respect us, though.