I think I know why they do it in the first place...
The world is getting more scientific. People are starting to find scientific explanations for everything - which is all good and correct, and advances our knowledge and culture etc. In short, people are finding different explanations for stuff that was originally explained by miracles.
So religion is faced with a dilemma. Its influence is dropping like a stone because people are enlightened and can't take miracles seriously anymore. Very soon, people will not be able to take anything in religion seriously. They still have faith, they still believe - but all this stuff in the Bible is bullshit. How can they believe that the Bible is the Word of God if science says it's wrong? They are just too enlightened and rational now to accept the explanations that were good enough for their parents and granparents. The leaders of religion face a crisis: How can they possibly get people to believe in the Bible again?
Enter creationism. If it can prove that the Bible is right after all, then science has lost, people will be more inclined to believe in religion, and will accept miracles more easily. After all, how can any rational person deny the credibility of the Bible when science actually
supports it?
Creationists need science to support them because they are facing an Age of Enlightenment where strict religions will be forgotten. The Bible will be reduced to nothing more than an interesting historical document. The power of the leaders of religion will be reduced to virtually nothing. And this is too horrifying for them to contemplate.
Well, there's my take on it. Enjoy...
The Rock Hound
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"Science constantly poses questions, where religion can only shout about answers."