Do you think my dad is correct about this?

So our religion is eastern Christian Orthodox. There are three main languages primarily associated with the religion and it's Russian, Greek and Romanian. So my dad was complaining about Mexican immigrants coming to America and not learning English. I mentioned how our religion, the priests and the people who go to church sometimes don't speak English in America. And my dad said that's not the same thing because the religion is coming from a different country and that's how the religion is it's impossible to change it and it shouldn't be changed. My dad said the Mexican immigrants and our religion is different and cannot be compared. I was wondering if you agree with my dad. If it makes sense what he is saying.
Do you think my dad is correct about this?
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