Charles Murtaugh points to an interesting Science article (reprinted on a creationist website) that quotes E.O. Wilson's On Human Nature as follows:

the final decisive edge enjoyed by scientific naturalism will come from its capacity to explain traditional religion, its chief competition, as a wholly material phenomenon. Theology is not likely to survive as an independent intellectual discipline.

On the other hand, creationism (at least of the hard-core kind) is quite able to explain evolution as a wholly spiritual phenomenon. It's the work of the devil, planting misleading evidence and whispering ideas in unfaithful biologists' ears.