Games Master was hoping to play his only two Force Sensitives at opposite ends of the spectrum. Because I don't want to be Dark Side unless I can be honourable and heroic, I'm out. Really. GM wants his Dark Sider and I'm just not going to cut it.
Sounds like your GM has control issues. Or he's going to try to instigate some "player vs player" action, which can easily get ugly unless everybody is on board and knows the score.