Even in local matches between two villages the opponent team is taunted because of the feeling of "WE" and "OUR" and "our team should win" feelings. Will you all call it Racism? It's overenthusiasm. Casteism is there in India but not in Sports. But regionalism is there. If the Australians had taken it sportively no problem. They are under compulsion to prove that not only Australians do racist abuses and even others do, so that they can escape accusations. That is why they make a lot of hue and cry. They are instigating the australian cricket viewers in advance that Indians should be troubled when they go to Australia, that's it.