Mainstream Hindus from any caste Higher/lower never convert to Chrtianity...Christ and the proselytizers have been around a few hundred years. The british ruled the country for 150 years and the christian pop. never exceeded 2-3%..The lower castes in India are as much proud or their heritage as the higher castes. The lower castes have political/ecomomic clout. There was a time when they were disadvanged because of their castes...not in todays world any longer...Anyone who works hard gets some opputunity in today's India irrespective of caste/religion...
..So the chritianity is at a dead end in India...Even if they do convert all the tribals...The primary chracter of India would remain Hindu.....I am not concerned about the church trying to convert main stream Hindus any more..they abondoned their attempts long ago...The tribals are not part of the Hindu mainstream and I am glad that the tribals are now a matter of attention...At least there would be attempts to improve their lot..