Dumbledore and Snape: Johno's theory

Before yesterday I was perfectly ready to believe that Snape was evil and Dumbledore was wrong for trusting him. Then along came Johno's theory from the perfidy.org site and I've completely revised the way I see it. (When you go to this page, you might have to click on a link "More Perfidious Goodness".) Thanks, Johno, for what I believe is a great insight and one I believe to be more worthy of Rowling's genius than my original thoughts. They were based on my desire to believe that Snape, someone I find it difficult to like, is really on the side of Voldemort. I'll be developing more on this theory in a coming piece entitled "Dumbledore's Sacrifice".