I still can't understand one thing, how did Symonds know that the monkey like sounds were made for him. If you realize that India was loosing that match and we know how unpardoning our fans are. They could well have been mocking the Indian players. Also they could be mocking other players.
Even if they were mocking Symonds, in India making monkey gestures is not considered to be racially abusive. The problem is that what action or words are racially abusive depends on the perception of the community. It is possible that the people might have taunted him, but did not want to racially abuse him.