Nothing in evolution takes away from God as Creator and Sustainer. Those roles are for questions like "why is there something instead of nothing?" or "is my very existence worthwhile and trustworthy?" The equivalent "how" questions are presumptive and out of our rational ken by the very definitions of the infinite and the finite, no? To wish the universe to function a certain way and then demand it of God is surely dangerous. We live in and explore creation as the only (so far as we know) beings able to reason and know right from wrong. But we dont get to make up the rules of the cosmos. Those are outside of our remit! We can only explain them. Yes, science is always provisional-- good point, that-- but it does not mean that science doesnt elucidate on nature quite well! Judging on whether God's cosmos is run the way we would like it? Not a good idea.
My strong suspicion is that the real battle here is the traditional battleground of
theodicy. Evolution shows all beings, including humans,
red "in tooth and claw", fighting and grasping, and suffering seemingly meaningless death in the tight, unbreakable grasp of uncontrolled, untamed, absolutely brutal forces. Its not pretty. Definitely not. Darwin's tears when he lost his beloved daughter were as much for his lost faith as for her. He definitely saw it. And I personally find theodicy the thing most able to seize me, and my hopes, into despair. I would love to say that nature was not so callous and that evil not so regnant. But, my creationist friends, the problem of theodicy was around long before Darwin and will be around long after us. Meaningless suffering, or, worse, the unjustified triumph of evil, will always be the great mystery. Evolution does not change that, even though it makes it brutally clear. The mythic answers (as in "deepest truths") for Christians are only to be found in the Theology of the Crucifixion. Not in trying to deny science and reason.
So read "On the Origin of the Species," and then ponder
The Passion. Or the
Book of Job. Or the
Bhagavad Gita. The big questions have never changed.