Evolution, at least so far as it deals with humans, attempts to explain how H. sapiens came to be. It does not delve into matters of Original Sin, and most of the Christian theistic evolutionists I’ve ever encountered view the Fall as something that happened somewhere near (before or after) H. sapiens sapiens evolved.
The evidence for humans evolving from early hominids, and having common genetic ancestors with the other great apes, is very compelling, right down to the same endogenous retroviral sequences in the same places with other great apes. I don’t think it is the job of any scientific discipline to square that evidence with theological statements, any more than I think it is the job of any theologist to square the Bible with the scientific evidence. The theistic evolutionists I’ve talked to view them simply as two separate yet unified revelations. They cannot be opposed to each other, and any apparent conflict is due to our lack of understanding, not to some inherent flaw in the science.
One of the greatest of all the evolutionary biologists was Theodosius Dobzhansky, an Orthodox Christian. If he found no conflict between scripture and evolution, I’m not prepared to argue with him. Evolution has nothing to say on matters like Original Sin. Unless you can point to some genetic sequence that created Original Sin, I’d say there’s nothing to debate. Frankly, i suspect even asserting that there was a genetic component, rather than a spiritual event, probably runs rather close to heresy.