I’m sorry to break the bad news to you: what scholars think of the historical value of John’s gospel is a million miles from what the man in the pew thinks:
J.D.G. Dunn, The Evidence for Jesus. Philadelphia, PA: Westminster Press ,1985, pp. 31-32.
Dunn is a British New Testament scholar who was for many years the Lightfoot Professor of Divinity at the University of Durham. He is a minister of the Church of Scotland and a Methodist local preacher.