Atheism at an impasse

Here's a striking admission by a rabid atheist, regarding the stalemate between theism and atheism:

The prospects for a simple, confined argument for atheism (or theism) that achieves widespread support or that settles the question are dim.  That is because, in part, the prospects for any argument that decisively settles a philosophical question where a great deal seems to be at stake are dim. 

The existence or non-existence of any non-observable entity in the world is not settled by any single argument or consideration.  Every premise will be based upon other concepts and principles that themselves must be justified…The question of whether or not there is a God sprawls onto related issues and positions about biology, physics, metaphysics, explanation, philosophy of science, ethics, philosophy of language, and epistemology. 

http://www.iep.utm.edu/atheism/#H6