That's fine as a starting point, but the Dark Side twists your perceptions, what was a reasonable but opposing viewpoint becomes unreasonable the further you go into the Dark Side. Look at Anakin in the Revenge of the Sith, his views are skewed, and as the film progresses they become more so, until any disagreement is answered with anger and perplection.
That is why the Jedi suppress emotion, any strong emotion can lead to a moment of anger, which lead to more moments of anger, and then your corruption.
I was going to disagree with this in part until I had a little more coffee and things started to work better. I was going to make the point that not all sith fuel themselves with rage, that
in the knight story.
immersed in the dark side and are entirely reasonable when compared to Darth Vader.
There are a couple of points to consider about that, though. One, we don't know how darkside
Lastly, it may be that