I would take that museum with a grain of salt. It was created by a people that have an obvious bias against the US soldiers. Supposedly the museum fails to present context for its exhibits and knows about and takes advantage of the fact that the vietnamese war isnt known well outside of vietnam. Think about it. The enemy we fought in vietnam won the war and then Vietnam created a museum about that war. Of course they are going to make our soldiers out to be monsters. North Korea did the same with their war museum. Except they took it even farther and basically make the US out to be an army of sadists, masochists, and blood drinkers.
And we're taught about the atrocities of the war. We're taught about the atrocities our soldiers faced in a conflict they never should have been in. Being cooked alive by our own napalm, being exposed to cancerous chemicals, a brutal environment they weren't ready for, a fanatical relentless enemy they didnt entirely understand, an enemy that employed guerilla tactics, an enemy not at all bound by the Geneva convention, little public support, soldiers that felt a deep shame and no support when they returned home, a Congress that wanted to half ass and half fund, a press that more than any other time in history reviled our own military etc.
Dont get me wrong. Some of our soldiers lost themselves over there. Committed atrocities against the natives. Some paid for that and some got away with it. But our general military and the average soldier weren't a bunch of SS officers exterminating a race of people.
And you've got to remember the environment and the enemy were farms and farmers and an army of poor people using villagers and civilians to hold, smuggle, and move weaponry and supplies for the enemy army. Everywhere our soldiers looked they saw a potential enemy or someone helping the enemy. And a lot of our soldiers were drafted and young. It's really no wonder that many civilians were killed. The whole thing was perfect storm. A nightmare scenario.
And frankly I dont think any army can effectively fight a war in that type of environment without high civilian casualties. The enemy is within and literally under the civilian population and infrastructure. Its thick jungle. I think youd have to employ a Roman tactic to actually win. Burning entire jungles down, displacing most villages, and moving across the country like a relentless brutal tide to actually win. Obviously we couldn't do that so we never had a chance of winning. And when soldiers sent to die in a hopeless brutal war and surrounded by the enemy that's so very different from us...well like I said it's really no wonder some of our soldiers went so wrong over there.
Again, it doesnt make it right, but the context is important.