The one type of gun store employee we all love, is the EXPERT! knows all, when the Glock first came on the market, Cheap/inaccurate/will not fire +p on and on. In the US of A, there is racism, of course there is, it is every where in the world. More common at gun shows/Gun Stores? I don't think so, but every one looks at the world from different places, if you are a non white (stupid term) or not, the original poster has a little aggression he needs to think about.
My Wife was born in Guyana, they say they are West Indian when asked (must have floated off the South American Continent) and as well as being lovely, she has an Indian kind of look. When we moved to Florida I thought we might have some wee problems, 4 years ago, none, no comments of any nature (I am an ex Scouse, of the white kind) kind of aggressive Scouse (are there any other kind?) One thing I have noticed, my accent unlocks the faces of the black people I speak to, there is a kind of mask on the average individual, when I smile and speak, they smile back.
How to deal with a problem? it is not your problem, if some one treats you differently, or you only think they have, move on, nothing you say or do is going to change some one else's attitude, it is their problem.
I am 72, and having a great time, happy and healthy, in love with my Wife, have 4 Grand Kids, love them, two kids, and two step kids, love them as well.
So look out at life with a smile, if things turn bad, act accordingly.