You were talking critical analysis, I was talking critical analysis. You asked whether the whole analogy was redundant. It wasn't, because the Americans definitely had racist attitudes towards the Vietnamese.
It's an obvious subtext in the film. Even Luke and Han underestimated the Ewoks, because they thought they were just animals.
And yet Yoda states Luke is a Jedi prior to that, despite TESB where Yoda heckles Luke for misjudging Yoda for his size and lack thereof. Was Yoda in ROTJ still heckling Luke? He wasn't snickering as he died and faded away. ObiWan returned as a force ghost for an obligatory chat. Why didn't Yoda make one last ghostly visit to nudge Luke with that oversight? (The writer being bored and just wanting to close the chapter, which offered nothing new apart from finding another actor to play the Emperor in the way they didn't think of doing so in TESB* and, of course, the obligatory saving of Han - with a plan that doesn't make any sense...)
* hence the special edition dealing with that, complete with excessive exposition that just about ruins the big shock crowd-pleasing reveal at the movie's climax to anyone who's not seen it before but are watching it in intended/sane order (IV,V,VI,I,II,III,VII,VIII,IX), and clearly does ruin it if said anyone sat through the episodes in Episodic order (I,II,III, IV, V,VI,VII,VIII,IX), assuming they slogged through I-IV and didn't give up on it out of abject boredom, would scream "spoiler alert" once Darth has his holographic chat with the Emperor in creating such an anticlimax thanks to the special edition's excessive alteration (bringing in McDiarmid was inspired, expanding his dialogue from a reasoned length to unnecessary expositional and plot twist-squelching litany was another.)