I don't think so. I feel Indian managers have a tendency to hire anyone else but Indians. If they have to favor Hindu, Brahmin, Muslim is very subjective, depending on that person's background, but I would say very rare. If they really have a prefrence, it will be "the connect", like if they both can connect based on region (ex: Delhi or that region) but very few Indians of current generation would care about caste or religion.
This is a remarkable claim. Not a single Indian in tech that I know in my personal or professional life - numbering over a hundred - has ever disputed that Indians have strong (sub)ethnic affinities that color their views hiring. In addition, nepotism is a real thing in Indian culture. I’d be laughed out of a room with aforesaid folks if I claimed “Indian managers have a tendency to hire anyone else but Indians”. This is either deliberately misleading to “save face” on behalf of the community (another cultural trait), or you’re utterly oblivious in an outlying way to how things work.
> I feel Indian managers have a tendency to hire anyone else but Indians
I'd guess this varies massively depending on whether the hiring manager and the people they're hiring are H1-Bs.