That's a false, sweeping generalization because not all men believe God revealed himself through your scripture and what you believe is God's revelation through (your) scripture is not known to all men.
So for example, I could use the teleological argument for the existence of God and prove that God exists independent of Scripture. Scripture is the supporting evidence that proves the only true God.
Nonsense. You cannot prove the existence of God. You can assume it based on man-accepted a priori postulates, or you can simply believe it (blindly). In either case, it is a man-made construct based on an a priori belief. Whether you assume that your postulates are true and then "prove" God based on those assumptions, or whether you simply assume there is God and then retro-prove His existence amounts to the same thing. But it proves nothing.
***You cannot prove the existence of God. ***
I would be more worried, Dear Kosta, that God can prove the existence of you.