"..when it comes to evolutionism, Christians usually know what the bible says but many give more credence to Darwin.the scripture becomes subservient to shifting evolutionary ideas."

And there we have the crux of the debate. At some point, the evidence for scientific explanations in paleontology, geology, cosmology, anthropology..etc., becomes so strong that 'many Christians' feel they MUST discard---not the Bible--- but literal interpretations of it. It is not a matter of "becoming subservient" but rather of sharing the stage. Don't YOU know people who consider themselves to be good Christians, but who just accept the idea that 'evolution' is how God set up the workings of the universe?
I often look at a web site about astronomy. Today there was a link to this site about Cosmology. I don't understand 90% of the math references, but what I can glean from it is that those who do that math, after observations, are daily learning more & more about the size... and age... of 'everything'. It is awe inspiring... but it is measurable, just as things beneath our feet are measurable. If folks want to believe that some all-powerful force they call 'God' started it all, I can only shrug. Maybe it happened that way... but *IF* a god gave us the mind and brains to measure his creations and write about them, I can't imagine He'd want us to limit our knowlege to one set of ideas written in one collection of stories passed on by fallible scribes for several thousand years!