Smythe Volvo Cars

I was transferred to the US for work and wanted to buy a vehicle as soon as I arrived. I visited a couple of vehicle dealers and all of then could sell me a vehicle, as long as I had proof of ID. I found a car that I liked at Smythe Volvo. A rude salesperson, told me that they would not consider any of the documents I could provide (ID, passport, foreign drivers license, SSN) as as proof of ID. He was very unhelpful, not providing any valid reason for not selling me the vehicle. I felt discriminated in this car dealer, since in other places they allowed me to buy a car. In "Motor Vehicle Commission of New Jersey" website, they say you can buy a car providing "Purchaser’s actual driver's license OR identification document."