It has nothing to do with brands, it is solely about insecurity. "I make myself seem better by dragging you down". If they can find something to show they are better than you, they will jump on it. Its in all hobbies. On the AT its "I am more pure than you" (i.e. I have passed more white blazes than you). In living history its "I am more accurate than you". I actually had a lady tell my daughter that she (the lady) was more Hessian (we did Revolutionary War reenacting as Hessians) than my daughter, even though my daughter was actually born in Hessen and is half Hessian by blood (the lady was American). In the Jeep world, if you have a Wrangler they then check for pin stripping, if you don't have any they will pull out the Mall Crawler card. Sorry "dude", I don't go out of my way to screw up a $50k vehicle just to impress people (some people don't understand the concept that it takes skill to NOT break or damage things).
I kind of take it as a compliment, the person is so impressed with me that they had to try to bring me down to their level.