Here goes. God believers should be asked: Is this god best described as finite, nothing, or infinite?
If they answer nothing, then there is no god. If they answer finite, then the god is not omnipresent or omni anything except perhaps immortal somehow.
So the expected reply eventually if the person believe in god to be that god is best described as infinite.
So if something infinite creates of itself something finite, like for instance the universe as measured by mass, finite with respect to infinity is zero. So god created zero or nothing if there is finiteness in the universe with respect to infinity. As for cardinal sizes of infinity, a branching reduces the infinity cardinal which doesn't sound an infinite god.