It is the ego matter of priest that he do not apologise for insulting the dignity and pride of millions of dalit of the country.For a time being if it is expected that it is matter of religion insted of caste it means there is no conception of conversion in hindusim.
In facts most of the priests including Mullahs make every issue a matter of prestige and ego and do a lot of harm to their religion, Muslims priests do too and hindu example is there.