could be performed to prove the specific god Yahweh to be the initiator.
Is all truth required to explain the universe accessible by science? (In the falsifiable sense.)
If the answer is yes than it would be nice if someone who actually believed this could show this statement is true via scientific experiment in order to be self-consistent. Because if they believe this without a pattern falsifying evidence, then they have nothing to show for this belief besides faith in what they have no evidence for. (Evidence in the sense that meets their own standard of evidence) But even until then, if Krauss believes this, he needs to construct falsifying experiments for his own claims or admit that his ideas are as in the same un-falsifiable camp as much of what he critiques.
But if the answer is no, then we have to admit there are entities (items of truth) outside of science's purview required to explain the universe inaccessible by science. Thus something "like" (not necessarily identical to) God becomes necessary because you need something that is true and real that transcends science to explain the world around us.
Of course, this does not mean you abandon reason. I think some of the most sophisticated and intellectually inspiring non-scientific arguments have been constructed by Christians... like this one here by Pruss.
So is there such an experiment? I am open that there might be and would be thrilled if there was. However, the fact remains there is no falsifiable experiment that has ever been constructed that supports the idea that all truth be explained in terms science and so I am also open that for some things no such experiments exist.