"I don't have to. To assert the non-presence of God as a scientific necessity is to be dogmatic, plain and simple."
To assert the presence of God places the burden of proof on the one asserting that presence.
To assert the absence of God requires the same burden of proof. To leave the matter open for consideration is the burden of science. Judge Jones thinks that burden is too heavy, so he prefers, along with others, to be a dogmatician.