This is definitely a social studies or English thing. The modern world of science, democracy, and commerce originated in a mixture of Helletic and Christian thought.
Origin stories as science isn't good science, policy, or even theology. What good is faith if you are trying objectively prove the existence of God?
Well, the whole "creationism should be taught in science" thing is because genesis, if taken literally, disproves bacteria to mammal evolution, as there is no coherent way to get the cycle to happen in six 24-hour days. The NOMA principle that science and the bible can coexist peacefully with no conflicts is not at all true if you take genesis literally. That is why "biblical creationists" want YEC/Gap Theory taught in Science - because they believe it takes the place of evolutionary theory - or at least the associated theory of Common Ancestry. To settle for teaching it in Religion/English would be to (implicitly) admit that YEC/Gap Theory is unproven in their view, and to give unmerited (in their view) validity to evolution by not forcing it to "do battle" with creationist theories in the science classroom.
(I am playing Devil's Advocate here. I think most of you are aware of my progressive creationist/theistic evolutionist stance, and I stand by my first post on this topic as to my own views on this subject.)