Okay, I call myself a Christian, and believe most of the content of the Nicene Creed. But my understanding is that a follower of Jesus should treat others in the compassionate, generous, non-judgmental manner He taught, not as the thpical Christian Right does. So I may be able to give a bit of perspective here.
First, for the so-called “Bible-believing Christians,” it is the ultimate authority, being in origin the written word of God, and anything which contradicts it in any way must be in error. Of course, this requires that one disregard the obvious genres of writing contained in Scripture, and take it as literal reportage of events. Hence any Christian who has bothered to study the Bible in the contexts in which its constituent elements were written rejects this facile literalism.
But let me propose, for the sake of argument, that we make the contrafactual presumption that the first dozen chapters of Genesis are literal accounts, etc. And then we go about examining the cosmos, the rocks and fossil record, the ethnic distribution of mankind, etc., according to the prinicples or their respective sciences. In point of fact, despite our insane presumption, we will come to the same conclusions as the moderrn scientific consensus in each discipline has.
Why? Because science is limited to examining what can be presumed to have happened in accordance with the natural laws we can induce from the world we observe, It tells us what would be the logical inference from astrpmp,ocal pbservation, geological and paleontological studies, ethnological relations, etc. That according to literally-understood Scripture God did something different is not relevant to what cosmology, geology, and so on can tell us. “If I drop tjos ball, it will fall to the ground.” “Yeah… unless someone catches it first.” Fpr pbvious reasons, the catching of the ball is not a ‘disproof’ of what dropping the ball proves.
And, of course, since any Biblical scholar worth his salt knows the importance in Jewish literature of haggadah, the story-with-a-point, of legend, the literalist approach is of no value to anyone who bothers to try thinking things out.
But in a world where things change and people lie, the idea that the Bible can be relied on for factual information about the universe’s and world’s origins and early history is a comfortable untruth.