Beautiful quilt, you are talented.
I would say: Old man, you just opened up a can of worms for your education. Then launch into what the quilting world is doing. The quilting for causes, for benefits, for the love of the art. It's so sad when a person such as this fellow allows his world to become smaller and smaller and not make strides to self improvement and learning. Most of us spend our whole lives learning, exploring and yes, enjoying our fellow man. Even this old geezer who was rude to you. He missed his chance in meeting a new friend in you. His loss.