OK - fine. You think it's meaningless. Now what?
Do you not see the irony in your insistence of empiricism and "testable hypostheses"? That in your own way, you are as dogmatic as the Christian is in your insistence that the criteria of YOUR philosophic position (Naturalism) define the rules of what is "real"? I could do the same to you: "Until you accept that there is such a thing as the spiritual realm, I really can't give you any arguments about God's existence." Naturalists kid themselves with the idea that they're "open-minded" and "objective" - they're not, because they - by very nature of the suppostions that Naturalism requires - eliminate God as a possibility - which therefore mitigates the self-proclaimed "open-mindedness" or "objective" nature of their inquiry.
To explain why God is not "testable" would take far longer to write than I think you'd care to read. At issue here are the ideas of faith, freewill, love and the character of God (which Satan has challenged); God cannot be scientifically verified because the limitations of human empiricism and our "tools" of inquiry are insufficient to grasp the presence of God.
To the believer (whose presuppositional mindset begins from the idea that God is real) the universe has loads of evidence that testify to His presence; to the individual proceeding from Naturalism, this same evidence has to be explained in some other way (i.e. evolution).

