Bad customer treatment

Yesterday afternoon 11 Dec I went to the BP garage next to Morning Glen mall after work at around 15:30. I parked my car at the parking lot near to the entrance. I bought a few things at the shop and waited for my wife in the car, she was going to be dropped off by someone there. After about 10 minutes an Indian gentleman who said he was the owner came up to me and said I'm not supposed to park in front of the ATM and I should move my car elsewhere. When I looked, the ATM was an enclosed ATM and where I had parked was a proper parking bay. So I tell him, I didn't know I was not supposed to park there, but you guys need to put a sign or something that prohibits customers to park there. Then he says to me \I suppose the government should also put signs of no *****ing everywhere". What the hell? So I moved my car further away from the ATM and as I was parking he comes up to me again and says I should move even further away. I felt so humiliated and embarrassed as this happened in full view of other customers. Did this guy think I'm a thieve probably because I'm Black? Is this the kind of treatment customers get at BPs?"""