I think that another point here is not to classify things you don't like as 'evil'. For all we know, they could be just as scared of us as some of us are of them. Dividing such 'things' into good and evil is way too simplistic. I doubt anyone would classify all humans as either good or evil. Some people have more elements of good than others, but there's a large grey are in the middle where such labels fall off.
It's the same with 'light' and 'dark'. I've come across people talking about people and forces as being 'of the light' or 'on the dark side'. Again, these labels serve no purpose other than to show how scared we are of things we don't really know.
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