Wrong answer.
It is between those who believe Christian doctrine, and those who are willing to rewrite it.
You do realize that the Catholic church has officially stated that they have no conflict between their interpretation of Genesis vs. Evolution?
Again, my point is that Christians don't all believe in creationism. Christians can't agree on the meaning of the important parts of the Bible, so it is not at all surprising they can't agree on the meaning of Genesis either.
By the way, I got my ideas on the non-conflict between Genesis and Evolution at a class during a Southern Baptist church retreat. Southern Baptists do not have a hierarchy of doctrine like the Catholics, so some may consider evolution heresy as you do. But my point stands that Christians do not agree on the meaning of Genesis vs. Evolution.