Sepharih said:
That's fine, but at what point can we suspend our disbelief to think that Luke would actually turn to the darkside here? If one moment of weakness and anger is truly enough to cause a complete and total fall to darkness without any other motivation for our main character it makes the story feel extremely shallow to me.
Well, remember what Yoda says in EMPIRE (I believe)... the Dark Side is not stronger, just easier.
The whole point is not whether the Rebels or the Emperor wins; it has always been about a boy becoming a man.. everything else is just an elaborate smokescreen to make the real story a bit more exciting.
IE. it doesn't matter whether Luke joins/kills/becomes the Emperor.. it is all about losing oneself and becoming everything you hate and fear. Hence, all it takes to join the Dark Side is to use what power you have to do evil things.. like kill people.