My point is, as an example, democracies with dominant religion as Christianity has its religious imprints within the governing body. A simple example to prove this is that all public holidays mostly are serving the dominant religion. (I didn't say Christianity is a common trait of successful democracies).
Wouldn't etho/religious supremacy apply here ? Why do you have the lens when you look at a country like India ?
Again my point and you still haven't answered. Going by your words, why do you think in India, people are not "supportive of rights of immigrants and other religious groups" ?
They probably are most culturally, religiously, linguistically etc diverse than any other country in the world. Yet minor issues aside they have decades of peaceful co existence.
I assume you are not from India, so why would you look at a country like that and have an opinion that they are heading to something bad. I'm genuinely curious.
Edit 1 - To add another point they have the most population in the world even. So, arguably, you are looking at the most complicated, functioning democracy in the world.