India is up there because many of them are vegetarian for religious reasons.

https://en.wikipedia.org/wiki/Vegetarianism_and_religion

Religion follows reality, though. It's not a coincidence that vegetarianism is common in Indian religions and not among the Inuit.

I guess the point is India can afford to be religious about vegetarian food because they can grow vegetables pretty much year round. India being a big country with all kinds of climate, there are pockets where is is much less enforced, e.g. the Himalayan states.