Personally, I'd don't see why this is an inappropriate forum, as long as the comments are intellectual in nature.
To address your point, I agree with your general claim that there's no logical inconsistency in a monotheistic view by itself. Suffice to say that the matter has been discussed so much that if there was a conclusive 'proof' against it, we wouldn't be having this discussion at all.
However, the argument against theism presented here is pretty effective against a standard, simplistic argument of religion which is basically 'how can something believed by so many people possibly be wrong' (which is how I interpret 'How can you not believe in God'). Holding up the multitude of religions, past and present, is a pretty good rebuttal.
Not an inconsistency, but a good argument.