I've seen that reaction before! After being insulted, screamed at and walked away from, it doesn't affect me so much anymore. You should have seen the reaction I got from my "Jehovah is a word made up by a Roman Catholic monk" fiasco in a parking lot. The result was mind-boggling for me but that was a whole 2 years ago. Now the person practically apologizes for using it around me (yeah yeah I know you don't believe that's His name). I can still see feel the confusion in their spirit.
I'll be having a similar conversation with someone later today. I was told a few weeks ago ..something about everyone believing the same - unlike the churches. (oooh that gets my blood boiling)
Today, I was going to start the conversation off with, "now I'm curious. If everyone believes the same thing, do you ALL believe Matt 1:16 or Luke 3:23? How about 1 Kings 4:26 or 2 Chron 9:25 - like how wealthy was he? What do you ALL believe Christ's last words were; Matt 27:46 & 50, John 19:30, or Luke 23:46 and WHY do you ALL believe that over the other two?... Or do you believe all three - how does that work? I'm fascinated by everyone believing the SAME THING with so many different angles to the Bible."
Remember I'm a theist so I'm not attacking the scriptures. :)