The best Viet Nam war doc remains Hearts And Minds in my opinion, and itís freely available on YouTube. Itís not heavy on presenting all of the politics I just discussed, but it is good at revealing the American mindset regarding the war.
I really donít disagree with your feelings on the topic. But people are influenced by media, whether they like it or not. Note that Oliver Stone made a film about a Vietnamese woman, Heaven And Earth, based on a memoir by Phýng Thị Lệ Lż Hayslip (itís really a pretty good book too, but donít read it if youíre squeamish), and it bombed. Americans didnít want to see a Vietnamese perspective, they werenít interested. I think if the film were released nowadays it might be more popular.
I like Apocalypse Now because it has a much stronger message than the tired excuse for movie violence that is ďwar is senseless violenceĒ. Itís an anticolonial film, and in that framing it fits the world at that time much better. Itís a far more powerful statement and doesnít exploit Vietnamese people to do so.