Couple points:
Verhoeven didn't even read the source material. Starship Troopers (the book), is only fascist if you assume that anyone that's pro-military is fascist. Heinlein was a very unlikely fascist, given that he was largely libertarian. The point of the book was that people needed to be directly, personally invested in a society for it to function; the bugs were a plot device that he used to flesh out his social concepts. It was closer to utopian than fascist.
Secondly, Lucas directly based Star Wars off Kurosawa Akira's "The Hidden Fortress". Ideas about the rebels and the empire might have been echoing US imperialism in Vietnam, but the overarching narrative structure owes a lot to Kurosawa. Ben Kenobi, Princess Leia, Darth Vader, C3PO and R2-D2 are very clearly present in the Kurosawa film. It's a fun movie, if not terribly deep or meaningful compared to Kurosawa's later films, and I would def. recommend it.