That doesn't change a bit about the obvious made up narrative of Vietnam being a threat. We are talking about that China here that tried to invade Vietnam for purely geopolitical (read imperialistic) goals in SEA.
You're still dodging the question.
Who first started building islands in the South China Seas first. China or Vietnam?
Vietnam can't really complain that China can do the same thing, but on a much bigger scale.
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Plus remember what happened in the runup to the Sino-Vietnamese war.
Back then, Vietnam had decided to firmly align itself with the USSR against Chinese interests.
And from the historical records, we can see Deng Xiaoping (and by extension the rest of the government) firmly believed that Vietnam was being controlled by the USSR.
And at that time, China was aligned with the USA against the USSR.
So when the Sino-Vietnamese war happened, no one in the West or Asia protested very loudly.
In fact, they were either tacitly supporters or were indifferent.
There are many lessons in this story
Before 1975, North Vietnam was an ally with China and the Soviet Union
After 1975, Vietnam was an ally with the Soviet Union and against China
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Before 1975, North Vietnam needed aid from two nations, to fight South Vietnam and the United States
After April 30, 1975, the north and the south united.
- At the time, the Soviet Union was a superpower, China was the third world nation, and the two countries had many conflicts. If Vietnam shows a clear attitude, sided with the Soviet Union, Vietnam will receive more benefits.
- Another reason is the South China Sea (Vietnam calls it "EAST SEA/Biển Đông"). China claims all of the South China Sea. Before 1975, North Vietnam did not object because North Vietnam needed aid from China, but after 1975 it was different. Many small islands in the South China Sea are occupied by South Vietnam. North Vietnam defeated South Vietnam, they felt that the winner should receive all the assets from the loser. The South China Sea has many resources, no one rejects this benefit.
Therefore,
Vietnam claims sovereignty over the South China Sea(Biển Đông) and is ready to conflict with China. Lê Duẩn believes that with the support of the Soviet Union, Vietnam will win. Seizing property and deporting people of Chinese origin (người gốc Hoa/Hoa Kiều) are the first thing he does.
Eventually, the two nations from allies, became enemies.
Many people believe that: China and Vietnam became enemies starting in 1979. This is a mistake. The problem started in 1975 and may be before 1975