What about discrimination against North Indians by South Indians? If you are from North India and a South Indian manager screwed you over, please comment here. I would like to know if its a trend. Counter examples are not helpful.
And yeah, I've had good friends from almost every state in India. Some of them were weird about it, most don't really care. So-called "nationalists" will screw you over in any region if you're a migrant.
Anyway, it's not a binary issue. It's just something that happens, and it's not possible to legislate.