I don't think it's a silly question, Sherman. I assume you're talking about God in the accepted sense of the word - an almighty being who created the universe and who takes great interest in the progress, or otherwise, of mankind? If so, I can't think of anything that would convince me, so I'm with Chakka. I would need to know what the claims are before deciding which to put under the microscope.
Oh, have a heart, Brionon! Punching Jesus's nose wouldn't be fair at all. I mean - honestly - is it his fault that people made up stories about him after he died? The man has just had some terrible press, that's all. He was a Jew, and what good Jew would even consider founding a new religion? Perish the thought! The poor guy hasn't been around to defend himself for the past couple of thousand years, so the gossip-mongers have had free rein to say what they like, with no one to contradict them - and we all know how rumours grow and metamorphasise, especially when the fires are purposefully and systematically stoked. If you really want to punch someone, the story writers and the law makers would be a far more appropriate - and a far more satisfying - target.