Hello Dr. Craig,
You think that evolution is not a threat against christianity or theism in general. However, I think an argument can be made against theism or at least christian theism from evolution.
1. If God created life (biological life), he would have created life in the best possible way someone could create life, because God is a perfect being and therefore only does what´s the best.
2. Evolution is not the best way therefore: God did not create biological life
Or in formality:
If A then B not Bmtherefore: not A
Of course, it does not necessary follow from "God did not create biological life" therefore "God does not exist". God could still exist even if he hadn´t created life (seems unlikely though), but at least the biblical account says that God created humans and animals, in one way or another. So, if God did not create biological life, this would be at least a argument against christian theism, if not theism itself.
1. The first premiss: I think this is obviously true, if we define God as a perfect being, then he would always do what is the best to do. If he had to choose between A,B or C and B is the best, he would choose B.
2. I think you will disagree here, maybe even before or even with the whole structure of the argument. I can´t imagine how evolution could be the best possible way for God to create life. You could think of possible other ways that would be better. For example: God could´ve just created animals or humans withoud the biological mechanisms of evolution or do you think God is dependent on evolution to create life? I don´t think so. So why would God choose A instead of B or C, a way in which his creatures had to go through pain, death and agony, a very brutal way in which only the strong will survive, when B or C seems to be a better way?
You may ask, what do you mean by "better"? Better for whom? God? In this sense you could think evolution is a better way, in terms of easier, less complicated. It may or may not be easier to create the first cell and let it evolve on it´s own like creating everything oneself. Somewhat like a computer scientist who lays the ground and then let the programme do the rest. But I don´t think it makes sense to think in this dimensions like "easy" and "difficult" because for God it would be equal. Think of a mathematician for example. For us it may be easier to count 2+3 than 156+213 but for a good mathematician it really wouldn´t matter. God is a good mathematician, so it really would´t matter in terms of easy and difficult. Then what about better method for animals? I think creating every animal on its own would be way better for the animals than causing unnecesarry pain and random mutations that often result in negative results and even mistakes through evolution. So, all in all, evolution does not seem to be a very noble method in which we would expect God to create.
Thank you and God bless,
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