I think it's really amazing how many people here think that a literalist, fundamentalist approach to the Bible is the only legitimate approach, otherwise a moderate or liberal is 'not a real Christian' or 'not living out their beliefs.' As Lilithu has pointed out, this is very much not the case, and it says to me that at least some non-theists have bought into the fundamentalist paradigm...a paradigm that was born during the period of Biblical criticism post-Enlightment.
Sola Scriptura is not the only way to approach the Bible, nor is it the way the Bible has been approached thoughout most of Christian history. Scientific thinking during the Enlightenment has split Christianity into polar mindsets, one approaching the Bible in a very literalist manner and the other approaching the Bible in a very personal, experiential manner. Twins born of the same crisis in history.
From what I've gathered about some of the different approaches to Christianity today:
Scripture alone, Scripture literal-factual - Fundamentalist/Evangelical movement
Scripture + Tradition - Catholic Churches, Eastern Orthodox
Scripture + Tradition + Reason - Anglican/Methodist
Scripture + Tradition + Reason + Experience - Methodist/Anglican
I don't know where Presbetyrian fall in there, and you can probably mix and match it in other ways, for example Charismatic/Pentacostal would probably be mainly Scripture + Experience. And the Episcopal Church is Scripture, Tradition, Reason...but I know that most of us would also count our personal experience of/relationship with God as very important as well. Esoteric/Gnostic Christians might say they are mostly Experience + Reason + Scripture, reversing the order of importance. And, I'm sure Catholics also employ reason and personal experience in their faith. Guess I'll apologize right now to all who feel I've assigned things incorrectly, but I do think the above is a good illustration of these different approaches.
This is what makes dialogue across denominations difficult, and what leads to misconceptions among Christians and by non-Christians. It's not only that we disagree on what Scripture means, we have a basic disagreement on the appropriate way to approach Scripture.
This is why comments such as that by both Harris and dogsgod are so insulting and not a good basis of dsicussion. They are starting with incorrect assumptions about what faith, religion, and theism is for a large number of Christians. I have noticed this in our discussions at RF as well...it's as if opponents of Christians first say that we are not real Christians unless we are fundamentalist Christians, and then they reject fundamentalist Christianity for whatever variety of reasons.
It's not a sound debate because they have set up a strawman of what a Christian is, and they proceed to tear that down, but it is not what we are.
Present company excluded of course.
I see you all wish to have a rational, legitimate debate about this, but I agree with Lilithu we'd be better of starting again with better assumptions about what moderate Christianity really is. If your position is that "faith is dangerous,' as seems to be Harris' position, what's there to debate? It's just a shouting match.