Broccoli:
What was Lucas' intention when he made 'Return of the jedi'?
He intended for the ewoks to play a large part (as their gigantic screen time and actions prove) in the rebel victory that destroyed the death star, killed the emperor and ended the empire (as the fireworks prove).
Thematically, Lucas intended to show how all you need is courage to overcome any obstacle - and sell a lot of toys in the process. But he overdid it. Little primitive teddy bears defeating a technologically sophisticated army is ridiculous for anyone older than 10.
So - the hard-core fans started making theories to show that ewoks weren't really so important - in this scene, you see x imperial craft, the empire is large and should have x and y - so you see, what ewoks did wasn't really so important.
But these interpretations/theories contradict Lucas' own - otherwise, fans would have more than a few 'blink and you'll miss' images and OFF-screen implications to prove their pet ideas.
As for the casual viewers, they will take from the movie what Lucas wanted them to, when he gave the ewoks so much screen time - the 'teddy bears' were instrumental in defeating the 'bad empire', so buy a cute teddy bear toy.
Given the chance to know hard-core fan theories, a casual viewer would not be interested - he would have better things to do with his time than listen to thesis excusing Lucas' failures in some movie or discussing EU logical consistency.
I don't know where you are getting this "hard core fan" stuff as my original statement on this matter was that I felt the fans are the ones overstating the Ewoks' contribution.
I realize that it might have been Lucas's intention at the time that the Empire was defeated (however, I never bought into that even when I first saw it - this was before I was aware of EU stuff). However, the idea that the entire Empire crumbled at that point is fairly ridiculous
based on what was described in this movie and the previous two. I'm not going into fan or EU theories about the ending of RotJ. I'm talking about the movie and what was directly shown on screen.
Unless you are arguing that the "casual viewer" are stupid, it is a storyline inconsistency and plot hole within the movie.
In any event, just answer me this: What did the Ewoks directly do that killed the Emperor?