http:// www. youtube.com/watch?v=n9oI-twWNDM
Kill John Lenon, kill John Lenon!
Seriously though i think South Park answers this question well enough, aside from actual political propaganda, when it comes to works of fiction, unless they are explicit in their meaning, we all like to infer our own views and ideas upon those work reading what isn't there.
Maybe Star Trek is a leftist marxist diatreb or maybe it's just wacky sci-fi fun, who knows for certain, Gene Roddenberry did but he's dead now so hollywood can piss on his creation.