The largest Vietnamese communities in America (i.e. in Southern and Northen California) still universally fly the South Vietnam flag. You can often see this flag flown with the American flag.
Using your argument, how exactly do you know better than the Vietnamese in the South (minus the Viet Cong) who wanted the US's help to combat the North's aggression? They literally fought alongside the US.
The largest Vietnamese communities in America (i.e. in Southern and Northen California) still universally fly the South Vietnam flag. You can often see this flag flown with the American flag.
Using your argument, how exactly do you know better than the Vietnamese in the South (minus the Viet Cong) who wanted the US's help to combat the North's aggression? They literally fought alongside the US.