I don't think it's illogical to assume, when we encounter a detailed language, that there is an intelligence behind it's writing. This is exactly what scientists have found, at a microscopic level, inside the living cell.

It is not absolute, testable proof of God (or of any religion in particular), but it certainly can be reasonably interpreted as evidence of an intelligent designer.

Another thing that you're missing is the idea of a claim. Prophets came with a claim that God has communicated with them. OK, there are no prophets around today, but what about the people who were around? Let's assume (just for the sake of argument) that we were around at the time of Jesus, and that he did perform the miracles mentioned in the Bible. If you had witnessed these miracles, would you believe in his claim?

This is not the end of my argument, I just want to see the response...