The problem with this analysis is that the roles are reversed.
Vietnam was a great victory for the USSR. The US is playing the role of the USSR this time around. The Russians are the US. Maybe Russians need to learn from other people?
Or Afghanistan. The US won there too, by supporting the Afghans. The Soviets were also the US.
Other people make mistakes too.
The problem with US political controversies is that everyone is terminally parochial.