Some folks never learn. If a lot of folks here could have gone back in a Time Machine they would have advised to keep fighting the Vietnam war with supposedly more effective methods. End result: The North still would have won.
Instead of refighting the Vietnam War, learn from it. I know our military did which is why they were so effective overthrowing the Taliban. They got maximum result with minimal ground forces.
Two things that are usually overlooked are that the VC ran a better PR program in South Vietnam than we did and North Vietnam with the help of the previously mentioned liberals and communists ran a better program here.
It is really a bit of a racial thing. If you are a poor backward Vietnamese peasant, whom will you believe, someone who resembles you or a big tall round-eyed big-nosed strange looking fellow speaking some foreign language????