I'm with you there. This is Star Wars, of course, with a clear good/evil dichotomy, but even then, they're being really extreme about it. Even Darth Vader wasn't as evil as some of the stuff that's being presented here. For my characters, I usually start with the intention to go light or dark, but over the course of the game, I do pick what makes most sense to the character, so I end up with a few dark side hits on a light side playthrough.
The various classes do seem to have different views of light and dark. Some classes get dark side points for being pragmatic, while others get light side points for being 'less' cruel. It makes no sense.