I'm a hunter safety instructor...and as such I am regularly subjected to the misinformed opinions of people who feel the need to inform me that I am wrong, and why. A fellow instructor and friend of mine, who is much older than myself, taught me to explain firearm and hunting related topics in a way which those unfamiliar with the topic will be able to understand. I like your idea Retro. This guy likely assumes you know nothing about the bible, and by demonstrating that you do you also intellectually smack him in the face.