What distinguishes Judaism and Christianity on the one hand from, say, Buddhism and Hinduism on the other? It is the formers’ reliance on history and the latters’ detachment from it.
Thus those Christians who want to say that it doesn’t matter whether history actually occurred the way the Bible said it did (e.g. Adam and Eve, Noah’s Flood, the Exodus, the resurrection of Christ) are cutting their faith loose from the historical moorings that God has provided. They would be making Christianity more of a philosophy than a faith.