There are irritating people like this. I wonder if they react that way to native Spanish speakers who come from other countries and have distinctly different accents. I am not a psychologist so I don't know what is behind this mentality -- resentment?True, you don't even need to go out of CABA just out of touristy areas. I was visiting someone near the Hospitales subte stop on line H, went to buy something at a kiosco, as soon as the guy realized I was a yankee he looked at me like I was an alien from out of space and started replying "que????" aggressively to everything I said even though I speak good Spanish and he knew exactly what I was saying