Oh, I agree that the NVA films are way over the top, and have very little value, as does the communist bit. Oh, and also the communists and like-minded groups being made up of the trash of society as well.
However, even though I really do wish that Lucas didn’t base the Rebels on the Vietcong... well, Lucas more than made it clear that he did with this: https://otnesse.tumblr.com/post/162081709399/this-is-from-george-lucas-1973-notes-for-star (and yes, those are my screencaps. I took screencaps of the necessary pages in case anyone doubted my claims about Lucas basing the Rebels on the Vietcong since 1973. The book was The Making of Star Wars, and you can find it on pages 16-17).
That, and his commentary for Return of the Jedi (either that, or Empire of Dreams) made the fact that the Ewoks based on the Vietcong and the Empire on America a bit too explicit (that’s also why I’m no longer a Rebel supporter but rather an Empire supporter, especially when I don’t like to be tricked into rooting for Communists and would never knowingly do so.).
If the rebels from star wars are like the Vietcong, then Bernard Cornwell based Uhtred of Bebbanburgh on Bishop Fulton Sheen.
I wonder what Lucas was smoking when he got that idea!