basically he's trying to rationalize that his said GOD is made of nothing, and is thus simpler than the Universe :/ It's non-material, a-spatial, a-dimensional ect.. All attributes of nothing, or non-existence! Hence made of nothing, in a place of nowhere, has no dimensional value, no-capacity and yet magically exists without complexity as well. Of course he's going to argue that because otherwise his entire ideology self-collapses, even though it does anyways if you actually take the time to put it into context.
I'm the one who said that "God is beyond the sum of all that exists."
This is a clear example of using a definition and applying it to your own personal understanding on theistic ideas. This is no different than the criticism of the common man who uses the word "theory" differently than scientists do.
When we talk about God, there is a sense of mystery. We can only make analogies or comparisons to try to even fathom the fathomless, so to speak. If I say that I believe in a Creator of ALL things, then all things that exist, including "nothing" in the sense we understand it scientifically today (i.e. that nothing isn't really nothing anymore), He created that. If we live in an infinite collection of multiverses, I believe He created that. If there are an infinite number of natural laws that govern the infinite number of universes, I have no problem saying God created that.
You see, anything that we can fathom, with our observations, with our technologies, and with our mathematics, I would argue God created. God transcends all these things, in my opinion, which is why He is beyond the sum of all things. I never said God is made of nothing. You are misconstruing what I said. You are comparing apples to oranges. Scientific language does not apply to theistic language. You have to judge the merits of the language based on the context of what is said. If I said, "it's just a theory," in this context, theory is used as a hypothesis. If I said "chill out!" I'm not asking you to go and freeze yourself.
When we speak about God, it's a paradox, and rightfully so! No logic can really comprehend God. It's a matter of faith, which is not a bunch of stories one has to believe in, but the lens by which one sees the world and acts in it. By this definition, really, there is no one in this world without "faith." Perhaps, maybe the truly agnostic has no "faith" because he doesn't know what to make of this existence and beyond it.
The way we "use" our faith is by prayer, fasting, giving alms, etc.
Think of God as an infinite transcendence. There is no way to measure or understand Him on your own merits. But He is available for you, and makes Himself knowable to you.