MissingLink,
I think it's fair to either Theist or Atheist could be respectful or disrespectful depend on the grammatical
situation see below pasted article which I believe is neutral and fair to both parties or points of view .
Indeed, it would be rather juvenile to misspell God simply in order to insult theists. If such an atheist had so little respect for another person, why even waste the time writing to them in the first place, much less deliberately trying to hurt them at the same time? While that may actually be the case with some atheists who write the word 'god' with a lowercase 'g,' it isn't the normal reason why atheists spell the word in this manner.
To understand why, we need only observe the fact Christians don't capitalize the 'g' and write about the Gods and Goddesses of the ancientGreeks and Romans. Is that an attempt to insult and denigrate those polytheistic beliefs? Of course not - it's grammatically correct to use a lowercase 'g' and write 'gods and goddesses'.
The reason is that in such cases we are talking about members of a general class or category - specifically, members of a group which gets the label 'gods' because people have, at one time or another, worshipped its members as gods. Any time we are referring to the fact that some being or alleged being is a member of this class, it is grammatically appropriate to use a lowercase 'g' but inappropriate to use an uppercase 'G' - just as it would be inappropriate to talk about Apples or Cats.
The same holds true if we are speaking very generally about Christian, Jewish, Muslim, or Sikh beliefs. It is appropriate to say that Christiansbelieve in a god, that Jews believe in a single god, that Muslims pray every Friday to their god, and that Sikhs worship their god. There is absolutely no reason to capitalize 'god' in any of those sentences.
On the other hand, if we are referring to the specific god-concept that a group worships, then it may be appropriate to use capitalization. We can say that Christians are supposed to follow what their god wants them to do, or we can say that Christians are supposed to follow what God wants them to do. Either works, but we capitalize God in the latter sentence because we are essentially using it as a proper name - just as if we were talking about Apollo, Mercury, or Odin.
Confusion is caused by the fact that Christians don't typically ascribe a personal name to their god - some use Yahweh or Jehovah, but that is pretty rare. The name they use happens to be the same as the general term for the class that being belongs to. It's not unlike a person who hasnamed their cat, Cat. In such a situation, there could be some confusion at times as to when the word should be capitalized and when it shouldn't. The rules themselves may be clear, but their application might not be.
Christians are accustomed to using God because they always reference it in a personal manner - they say that "God has spoken to me," not that "my god has spoken to me." Thus, they and other monotheists might be taken aback at finding people who don't privilege their particular god concept and so reference it in a general manner, just as they do with everyone else's god. It's important to remember in such cases that it is not an insult simply to not be privileged.
http://atheism.about.com/od/doesgodexist/a/capitalization.htm
so you see each of us can be wrong given the context of use !
When the Christian God is referred to in a personal manner(as a name) use G....when impersonal (general ) use your own privilege
Just remember the cat- Cat rule of grammer
Cal