>>11011
The problem is that nothing was explained. How did they get dark side powers, where do they originate, what's with the retarded claymore lightsaber(I can see that it's really irregular due to Kylo teen angst).
EU has dark jedi and is explained when they are introduced as you've stated
In the originals even in the first movie it was stated straightforwardly who the siths are, who the jedi are.
In this movie it's basically nothing. Something something space nazis with ss knights.
It's like watching a bloated pilot episode for a cable tv series.