Giordano you have hit the nail on the as regards God and other gods.
Unfortunately for Monotheists they fail to understand that Atheists do not accept the exsistance of any God, not just the God which they believe is the only one and is exclusive to them, but when it is useful direct a Polytheistic solution to a Monotheistic problem. Discussions of this nature are only useful if the terms of reference and definitions do not constantly expand.
The problem is to except the starting point of the discussion. It would be true to say that the first proof required is that physical reality and therefore all evidence is not just the product of individual perception of reality, and that it is identical to every other individual, and that question dispite great debate remains unanswered. So all of us choose to believe that "we are therefore we think".
No Stonecutters- Fallen Angels can't perpetuate atheism, Lucifer is the god of this world according to God is he not? At least God accepts that he is not the only one, even if his followers do not.