From whatever we have read and heard about life of Shree Krishna, there is hardly any incedent wherein he considers people of other caste and creeds as untouchable. He was freindly and easy going type. He mixed around freely with people of all caste. Unfortunately Chritanity and other religion were not there during his period. Had those religion existed I doubt he would have ever kept himself away from the followers of those religion. I wonder how the preists of Gurvayoor Temple have got the notion that purification rites will have be performed when any non Hindu happens to enter the temple.