Followers of Christian religion and Islam extol the virtue of a caste less society. They jump on to the followers of native Indian tradition by accusing that Caste System is the biggest evil in non-Semetic religion followers.
But, I have heard about terms like "Pulaya Christiani" , Ezahava Christians , Dalit Christians, Dalit Muslim, Ahemdiya Muslim ( as If, Sunni and Shia are the genuine Muslims) etc.
When the people of the book co-habit, it is fun to see. In Pakistan, Asiya Bibi, a Christian lady is awaiting death sentence just because another Muslim Women accused her of Blasphemy. She was sentenced to death in 2010 and her appeal is also rejected.
This is yet another proof that Caste Systems and segregation exists in Islamic and Xian societies as well.
You can read about Asiya Mohammed case here and here. A petition page is available at the following site.