I always try to treat people respectfully, at least until they might warrant me to treat them otherwise. A person's beliefs, however devoutly held, are as fair game to criticism as is their taste in music. A sort of reverse "love the sinner, hate the sin" kind of thing.
At the age of five, Skagra decided emphatically that God did not exist. This revelation tends to make most people in the universe who have it react in one of two ways - with relief or with despair. Only Skagra responded to it by thinking, 'Wait a second. That means there's a situation vacant.'