This debate isn't about a literal interpretation of Genesis. It's about Paul's statements (spiritualization) regarding the fall of man, like in Romans 5 and 1st Cor 15.
You're right. It is about what Paul said, and how that has been interpreted.
Let's pretend that Adam and Eve never existed and that Genesis is fiction. It follows that it absolutely must be true that sin never enters into human society through Adam and Eve and therefore there is no need or reason for atonement.
But sin is still here. So Christ came to atone for those sins, and those people who do sin. Even if the story is a myth (and I am not saying that it is or is not), and Adam/Eve simply symbolize mankind and the heart of mankind... then sin entered still through their actions way back at the beginning of our existence.
Robdar is the one who told me that the Jewish faith does not blame Eve. In fact, it is Adam who has the repenting to do to God, not Eve.
I have never understood how Christians can dismiss Genesis and still find a basis for the animal sacrifices and prophets that led to Christ, 'the lamb of god that takes away the sin of the world.'
Just to be clear, considering that the Adam/Eve story might be symbolic rather than literal does not mean that a person is dismissing Genesis. It still teaches the same moral lesson, either way.
Tammy