Ok, let's stop talking theory nd get down to caes here.
Here is GL's commentary on good, evil and balance:
"If good and evil are mixed things become blurred - there is nothing between good and evil, everything is grey. In each of us we have balance these emotions, and in the Star Wars saga the most important point is balance, balance between everything. It is dangerous to lose this"
See? He specifically extols the virtue of seperating good and evil into black and white- and as far away from grey as possible!
Like I say, this is very established stuff. And as I say, disagree all you like, but this is still how it is.