How much time have you spent in Vietnam? I'd bet none, or maybe...

How much time have you spent in Vietnam? I'd bet none, or maybe as a tourist on an organised tour.
How many Vietnamese do you think are happy that the Yanks lost the war? I've never met a single one.
Might be time for you to get up from your computer and go and see the world and talk to the people involved.
China is getting worried with the number of Chinese companies and other investment moving to Vietnam to escape the USA/China trade war tariffs.
Higher wages and environmental regulations are also having an affect on the Southern manufacturing hub of China.
China with its Belt and Road project is a way of taking a control of much of Asia through investment and loans.
Its wise for Scott Morrison to point out the problem to Vietnam about Chinese aggression in the region. China is already unhappy with the amount of manufacturing thats leaving the southern Guangdong province to Vietnam.

Frankly what you say is extremely foolish, but I guess from reading some of your other posts I don't expect much better.