[bittercynic]

I thought this was written in an open enough way to leave room for a wide range of takeaways, and it also seems fair to say the shop keeper was acting like a jerk. Not that he's obliged to serve a client who's looking for something so different from what the shop provides, but he could have been more pleasant, and just let the customer know he doesn't have what he's looking for.

I think there is a place in the world for people with specialized interests to have a shop that caters exclusively to other people who are deep into the hobby, and to be a little brusk to normies who wander in looking for something else. It sure would have been a lot nicer if the shop keeper just understood the situation and kindly explained "That's not what we do here", but, hey, not everybody's gonna be super nice. It's part of life.