Sam's Club review: discrimination/ profiling customers by a greeter at the door

Today my parents and I went to Sam's club around 12:15 pm. My Mom went in first while I waited for my Dad to get a cart. When I walked in I saw the lady asking my Mom to show her membership card. At this time 3-4 people walking in the same time I did and none of us get ask to show prove of membership card. This is the second time this happened to my Mom. The first time it happened to my Mom and I. At first I didn't think anything when a greeter asked us for a membership card but, while I standing on the side trying to get my card out from my wallet about 6-7 people walked in and none get asked to show membership card. I just want to know when did Sam's Club start profilings customers and pick which race to get card check at the door on different day. The first time all other race get check except white. Today, any other race except Latino and black. When did Sam's club start discrimination and profiling customers when they walked in through the front door? I am outraged about being profiled at the door by a greeter. We have been Sam's members since this Sam's Clubs opened it door in Goldsboro. I, myself have been Sam's member in Hawaii, Michigan and here in Goldsboro for about 20 years now and this is the first time I been treated this way by a greeter at the door in this Sam's club. I don't think is Sam's club policy to profiling a customer but, I need some answers of why it starts to happened now.