If bible, koran, torah and other holy scriptures are wrong this will not prove that there is no God. If there is a God there is no way we can prove his existence if he don't want to. Our civilization is still very young, still many things we cannot explained.
God is there can be proved with confidence, not with the eyes of our eyes because our eyes can only see the unseen. Scientific evidence of the existence of God we can observe from our life there is birth and death, there is a barren there is a fertile, but they do the same process but not all women can get pregnant, death if it is natural then who will die it must be old, but in fact babies, children, teenagers too many died, this is one example we experience and can be seen around us will prove the existence of God in our midst that all we can not see Him.