I think creationists started realizing the whole magical appearance of Adam and Eve was a tough story for modern people to swallow, so they came up with this idea of "intelligent design" to counter evolution theory. Nice try.
They should just be honest and say they don't believe in any science at all because science demands rational causality and since everything magically comes from God, anything God wants to happen anytime, anywhere, can magically happen. So why even bother with science?
Of course, most religious people don't go that far. Most are perfectly comfortable using science to do something like design a bridge. They don't leave it to faith that the Lord will allow it to support the weight of traffic without employing science to design a stable structure. (At least I hope so.) But it's curious to me how people draw that line. "I trust science for pasteurizing my milk, but for telling me I share ancestors with apes, no way!" What's the criteria?