Hindus from the lower levels of the hierarchy thought that...
Hindus from the lower levels of the hierarchy thought that by converting to Islam they would come out from the Hindu hierarchy system, but in most of the cases they remained in the same hierarchy level after they converted. Among the Muslims of India there has developed a two-tier hierarchy. The upper class, called Sharif Jat, includes Muslims who belonged to the higher levels in caste hierarchy and also Muslims who arrived to India from foreign countries.
The lower class, called Ajlaf Jat, includes Muslim converts from lower castes. As in the world, the upper classes do not have close social relations with lower classes, the same way the Sharif Jat do not normally have close social relations with Ajlaf Jat. The different Christian communities of India were treated in different ways in different parts of India. The Syrian Christians of Kerala had a high status.
Along with the Jews, they were the business communities of Kerala and they too had aristocratic rights. The Indians who were baptized from the 16th century by Christian missionaries remained mostly in the same status they had before. As in the Muslim community of India, the Christians also have a two-tier social hierarchy. Many untouchables who converted to Christianity are still treated as untouchables, sometimes by other Christians.
The European Christians are also supposed to be untouchables to Hindus. Some Europeans in the 17th and 18th century even claimed that they were treated as untouchables. But later on with British rule over India it were the upper level Hindu castes, specially the Brahmans, who adopted the European democratic philosophy according to which all are equal and they introduced it to other Indians.
Other religions which were established in India - Buddhism, Jainism and Sikhism - also have some marks of caste system, even though they oppose caste system. Sikhism rejects caste system. But different Jats who adopted Sikhism act according to traditional Jat lines. The different Jats normally marry within caste lines. The Jats which were the elite of the Punjab and converted to Sikhism do not give equal respect to Sikhs who belong to the lower levels of Indian hierarchy.
The Jains also have separate communities who marry within the community lines. The Buddhist in India have a two-tier hierarchy and just like in the cases of Christians and Muslims it is also related to the status of the community to whom the person belongs.