Whether you want to see all of the political information on screen or not is one thing, but Starship Troopers turned the political segments into a straight parody of Heinlein's views. You shouldn't piss on the author while making his book into a movie.
As far as his views in ST being fascist, I disagree. They're not mainstream, but not totalitarian either. There was a democracy, you just had to earn the right to participate through community service. I'm not 100% sold on the idea, but it has some merit.