The purpose of Creationism is to discredit and destroy the Conservative Movement.
I've seen no proof of that, but I wouldn't be surprised either. If we could track the money flowing into the Discovery Institute, it might illuminate some things.
But one fact is sure, there are plenty of "useful idiots" following this junk. Just like the early days of the environmental movement.
I'll bet there's even more money in selling creationism than selling environmentalism.