Hindu’s had 4 basic castes. Brahmin, Kshatriya, Vaishna & Shudra. Kshatriya’s are the warrior class and are non-vegetarians meaning they can eat meat. The Shudra’s are the traditional non-touchables, who used to be the poorest people and probably ate anything they could get hands on. The other two castes are vegetarian.
The caste system is very much diluted now, similar to inter-racial marriages on the way up in USA.
I was acquainted with an Indian fellow who said he was one of the "untouchable" class, and being Catholic, he was raised in southern India. He grew up and became a Catholic Priest which brought him out of poverty and to the US to preach. He told me if he preached in India he would surely be killed. I'm not sure if this is because he is Catholic or because he's an untouchable or a little of both.