Thanks for the comments, some great points have been made.
Vidiot - Creationists reject evolution for ideological reasons, their worldview really gives them little choice in the matter.
I particularly enjoyed what you wrote. Whilst I agree with your summary of the Creationist mindset, there are ways to marry Creation, Evolution, the Bible and the Ransom. God can be the first cause, evolution progressed, and the evolved man eventually became sinful and needed Jesus Ransom. Or animals evolved and God then made humans, but maybe sometime longer than 6000 years ago - Genesis becomes figurative. Since civilisation is little more than 6000 years old, a thinking person can feel justified in accepting the Bible time-frames of Adam.
It is difficult for people to change their beliefs, and so a religions rarely make dramatic changes rapidly, but I think there are enough ways to match the Bible and Science, mixing figurative and literal interpretations, that it will be possible to hold to what seems a logical merge of the Ransom, Creation and Science for many years to come. The Watchtower at least tries to be more Scientific than young earth Creationists, which leaves JWs (who are not willing to scratch too far below the surface) thinking they have a very solid belief system.