Let me further explain what fault I find with your reasoning.

I say there is no God. You can't back your argument with scripture, when clearly I don't believe in God in the first place, let alone a God who you suggest has sent some sort of scripture. How do you know this is the same work of that said God? Then you say everyone knows there is a God. But here I am and I don't think there is one. The burden of proof falls upon the person who suggests there is a God.