Lets all keep in mind though, nobody here is the "bad guy" really. We can argue on logic and philosophy, but we all think we're doing the right thing. From my point of view, I see an obligation to stop the spread of ignorance and fallable logic, in the hopes of inspiring more to bring this world into an age of reason.
From Krogith's point of view, he feels an obligation to discourage us from turning our backs on the most important aspect of our existence, and the solution to all our troubles. and indeed, if I were so certain of god I would most likely debate just as passionately to save the souls of billions.