Mortis heavily insinuates an association of creation and destruction with light and dark with the day/night cycle on the planet, and correspondingly life and death. Therefore, even the Jedi, through the act of killing in self-defense and defense of others, are not behaving purely in a fashion befitting of the light side. The Fallanassi seem to be much more of an embodiment of the traits under the light side, with their non-involvement in pretty much anything, as well as Akanah's horror at Luke attacking two men in defense of her (whom happened to be illusions). Edit: But back to your main premise, I think Star Wars is Jungian in the sense that every character has their own internal light and dark sides, the ego and the shadow, and the Jedi have to overcome their shadow. That's Luke's struggle in V and VI, embodied externally in the form of Vader.