My experience with non-christians is that they have stereotyped Christians to the point that they won't even give anyone the benefit of the doubt. They always think they know what we're thinking or what we'll do even before we do it. And they always use it to dodge any discussion that gets them looking rather closely at their own beliefs.
That being said, I have met ONE atheist online that was interested in a discussion. Over the course of a year we became great friends. He finally admitted to being an agnostic rather than an atheist. (which is more intellectually honest IMO).
I guess if non-Christians prefer to obfuscate and remain unchallenged to defend their "faith" or "non faith" we will remain in ignorance. *sigh*