But the same is true for eastern religions too. They have their own power centers, and encourage spread to other parts of the world. Christianity was certainly a minority for us.

You're right. I was thinking in the context of the western hemisphere. Your situation is seemingly unconventional to someone who has lived his life in the US.

However, I have also found that even Indians who come to US seem to want their exclusive identity preserved, and complain about others coopting their identities, which seems rather different from the mainstream approach in India.

It's each one's own right to interpret the world. Your wife can view it as a positive thing, others may not share that view or link it to negative experiences they have had. The difference I'd like to get at though, with your Bakrid example, is that (I'm assuming) that celebration was put on by people of the Islamic faith. I've been to Holi festival and enjoyed the experience as well.

My contention is when these celebrations are mimicked by people who do not understand them. I think we'd both agree that multiculturalism is a positive thing. My asterisk is just *when done Right^TM