Why do alot of the customers on hardcore pawn get loud and obnoxious when they dont get their way?

A lot of the customers on this show are so outrageous with their attitudes its like when they here the word no they automatically think they are being victimized or something and start cursing and make a scene. I noticed all these customers are black. I'm not racist I would honestly date a black women.why do they always come across as loud and obnoxious like little children.is it just a mentality that black people have