When you go into a jewish store I supposed you exepect MORE from the store than normal, if you go into a goysih store and they are rude or not rude or not nice , you just ignore it. But when you go into a jewish store I guess you expect more so if the clerk treats you (without niceness or rudeness) you are upset
I also think when you go into a goyish store and the clerk is a female, they are told to look you in the eye , smile , and say thanks .
Frum women are not supposed to do this and are generally supposed to say as minimal as possible to the male customers. This is not rude but it seems like it when compared to a goyish store.
As a test talk to a friend, Ask him to look you in the eye ,smile and make some small talk, then ask the same friend Not to smile, look away from you and say as minimal as possible. You will notice the difference.