Are the Umpires & Match Referees Biased towards the Sub Continent Players?

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Well all the cricket lovers we have always seen that the Match referees and umpires are having biased attitude towards the sub continent players and one more continues with the Ghambir incident. The same level of offence committed by the aussies are just handled in a different way? Why is this step motherly attitude of the referees? Is there any end to it? We have seen many in the past but still the BCCI is just passing it off un-noticed?