Where do you find satan in this world?

I just got a nasty a$$ email from a fundie, who of course does not allow a return email, saying that I was duped by satan because he is the most diabolical of creatures. I was told to read the bible and be saved. I have read the bible and since satan is the most diabolical and sneaky it makes perfect sense that the bible was written by satan. After all he really is the good guy in there. In the bible satan killed 10 people, the best estimate of god's killing is 200 million. god likes and murder and slavery and satan was the only creature in the Garden of Eden who did not lie. so as near as I can tell the bible was written by satan and that is in part why I discount it. The other part is that it was plagiarized from the Sumerian tablets. What say you?