“The events that you are referring to happened 50 years ago.”
And Russia continued to fund and support and supply Vietnam for many years afterward.
Vietnam is currently one of the United States closest strategic allies in Southeast Asia. Obviously, they were/are a strong ally of Russia as well. It is interesting that Putin remains so popular with the public there despite the events of the last year. The same observation can be made about the public’s perception of Putin in India as well and they have not had a long-time close relationship with Russia.
Your observations obviously have some relevance, but do not explain the public’s perception of Putin well in either country. Western media and big tech have far less influence over these peoples, and this is the primary driver, not events that took place before most of their population was even born.