No Back Pack allowed because I have tattoos

Today at 8:05 I was on my into spar, I go to the shop almost every morning round about that time I normally wear a short sleeve shirt or a crew neck top. Today was a bit warm when I left the house so I decided to a wear a vest so now my tattoos on my upper arm, chest and rib is visible. As I walk in about 10 steps past the security at the front door I hear some 1 whistle and as I turn around I see its the security at the front door calling me. Tells me to hand my backpack in at the bag keeper. I told him \No, as I keep all my personal belongings in my backpack like wallet, I.D and cellphone he then said I can't enter then. I told him it's fine I'll leave. Keep in mind they never asked me to hand my backpack in before and I've been working in this mall for almost 4 years. I even asked him since when is this in place and he told me always. I then went to go sit on a bench infront of the shop for about 15 minutes. With in that 15 minutes exactly 13 people with backpacks and bags went in without being stopped. I feel judged and don't think I'll be going back there out of my own will. "