Who is to say which theory is correct. Evolution is a theory in the same sense that gravity is a theory. It is a hypothesis so well proven, so tested and retested, that it has become a basic principle of modern science. The only basic principle in creationism is the attempt to prove the scientific accuracy of the poetic accounts of Genesis. They seek to validate their religious beliefs with their muddled use of scientific language.
History is filled with religious authorities threatened by new scientific knowledge.
Once, heretics could lose their lives for denying that the Sun revolved around a flat earth. Currently, the Religious Right is threatened by and seeks to undermine the authority of our scientific and educational establishment. History shows that it is far more likely that religious fundamentalists are wrong on matters of science and not the scientists. Rather than being a theory in the scientific sense, creationism is a pseudo- theory. To make their theories seem credible, creationists must dismantle most of the foundations of modern science.