Luci, sorry it took me so long to respond. Had a busy day with my little girl at spiral scouts.
As for what I deem to be evil, I can really only site acts I see as evil, but they're pretty much common sense. I personally think what the Nazi's did to the Jews, etc was evil. I think serial killers are evil. Etc., Etc., Etc. I think you get what I mean.
I may believe that evil has it's own deity(ies) somewhere, but I do not begrudge those who believe otherwise. For me, the duality is kind of like the neutral part. A good deity may condone something bad, such as violence, for a good cause. Something such as defense of ones loved ones, while an evil deity may do or say something nice to trick someone.
I would say that one of the thoughts I had that led me to this conclusion was the act of purification and protection spells. I do not see me having to protect myself from the goddess or the gods and goddesses associated with her, so then who would I be protecting myself from? I know my thinking is very simplistic in nature. No one could or would ever accuse me of being a great mind, but I find the times I didn't follow my gut I ended up in a lot of trouble and the times I have, I usually fair a little better.