Yes, Argentineans (not all, but those from Buenos Aires) are racists towards dark skin people but NOT FROM INDIA, they are racist towards Bolivian, Colombian, Peruvians, Paraguay, out of ignorance...... But in their discrimintaion and their act of racism they will just not talk to you, means they will not harm you like in United States for example that they will beat you up for being from India..... off course not all of United States, just them red neck boys.......
Come to Argentina, you will have no problem, if you ever do, call me, you have a friend here, my phone at your service 15-6374-1962 Alex