I think so much of it is regional as well. I live in Maryland and have never seen anyone openly carrying a gun in public. I drove down to North Carolina a couple of years ago and was shocked when I saw a cashier at a gas station with a gun holstered to her hip. It's not something I ever see in Maryland. I live in a rural part of Maryland where hunting is really popular (I hear the gunshots going off from my house during winter duck hunting season on the water), but it's honestly not something I am worried about.
I never want to live (or even visit) a state like Texas or Florida where that kind of thing is normal.
Batshittery at its very finest. What are they afraid of? Or trying to prove? Personally, I would be horrified seeing that in a shop, and I would hate for my kids to see it. I don't care what anyone says, that is not normal and certainly not right.