Some posts in this thread made me laugh a bit
If you allow me to go back to the original topic, racism, I think it is important to mention the fact that, on a very general level, "rich" people in Argentina tend to be white, while people from the lower classes tend to be what is usually called black (here, "black" usually means "with characteristics of indigenous people", not Afroamerican).
So, it's not uncommon to find this kind of thoughts in an Argentine middle class or rich person's brain:
"poor = criminal"
"black = poor"
"black = poor = criminal"
What makes these prejudices worse is that people from our lower classes tend to like a certain kind of music called cumbia villera. Some of the songs' lyrics are actually about crime, drugs, etc. So it all spices up the stereotype according to which a guy with a dark skin color will attack you with a knife, steal your shoes and rape you if you two are alone in the street, then use your money to buy paco (a very cheap drug).
Some people from the middle class will actually cross the street or have some other "omg be careful!" reaction if they see a person with such physical characteristics walking near them.
So I personally think there actually IS racism in some parts of our society. If people from other countries believe we Argentineans are racist, my bet is that they've only met some right wing upper middle class white people.
That racism was never the main inspiration of any government, but many would say that it is important for the current local neoliberal government of the city of Buenos Aires, which has carried out violent activities on poor people in the name of "security".
However if we go back to the 19th century, racism against indigenous people was a very important aspect of some of our governments ("kill the barbarians and bring hard working Europeans to the Patagonia!", true story).
Another rather off topic thing I might add if you allow me, about the "Peron was nazi!" thing, yeah, the dude was a bit fascist and nobody can deny that, yet as people have said already, jews were not persecuted, and in fact the peronist government never did any persecution in the name of some ethnical/national cleansing bullshit. As far as I know the only persecution during that government was rather for "mere" political reasons, and I'd even say it was not such a big deal, mostly limited to less freedom of speech and blackmailing big companies. I would never call Perón a nazi, but I would say he was a bit inspired by European fascism, though only in the role fascism gave to the State in the economy. Also, Perón probably "liked" the fascist governments more than the liberal and communist ones because the USA and the USSR were real threats to Argentinean independence, while fascist countries were not, and fascism was over when he became president in 1946.