Hindu Caste System and Islam: (The king) Mahmud and (his servant) Ayaz stood in the same row (in prayer), hence no difference remained between the king and his servant.
When Indian people came to know the message of Islam they found its principles and rules a sort salvation from slavery, they embraced Islam voluntarily.
When Kumar was in India, he never imagined that he will become a Muslim one day but now he is satisfied and happy to be a Muslim.
There is no doubt that workers in India particularly and in the world in general are oppressed, their rights are violated, and the examples are not hidden to people.
