The point isnt to try to prove that God doesnt exist-its to try to disprove or call into question or show the contradiction in every other claim about God that people commonly refer to. Like, for example, How is he a benevolent God? Theres a million other questions that you can ask about "God", and they wont have answers for all them. Eventually, they'll see that agnosticism, or better yet, atheism, is the way to go. Well, they probably wont, but it doesnt hurt to try