I have lots of theories I've concluded about the more mysterious films Iíve seen, but as soon as I hear the original intent from the director's mouth I have no choice but to go with it. Their vision should not be ignored when the art is theirs.
In one respect, listening to Paul Verhoeven's commentary on Starship Troopers kind of ruined the movie for me. His "War is bad, so I dressed them in Nazi uniforms to show that" was really pretty pointless.
First, the movie was purely popcorn, and Verhoeven isn't known for being an Art director, I definitely think this is a case where he should have left his politics out of the film.
Second, Robert Heinlein would be spinning in his grave to see the way Verhoeven turned it into a completely fascist society. Heinlein was closer to Libertarian from what I understand, and the society was NOT a fascist society. Basically, non-veterans were non-citizens. They had all human rights, except the right to vote (it's been a while since I've read the book.) It boiled down to "if you hadn't served your country, what right did you have to help determine policy, which might include getting young men and women sent to die in combat." They used flogging as punishment for some military and civil offences, and the death penalty for a very few. Something like that might be a better deterrent than another six months in a comfy prison with free food, cable TV, a workout yard, and so on (all paid for by the state.)
Third, the war in the story was a necessary evil, Earth was drawn into the conflict the way America was in World War II. It wasn't like Vietnam or Iraq, etc. The bugs had one goal, and that was to wipe out humans (in the galaxy, or at least on Earth.) Humans were fighting for personal and racial survival.