Now I live in Detroit, right on the border of Canada. And I can tell you religious affiliation is a nonissue there. (Of course the queen in fact is the queen of Canada. But let’s not complicate things.)
Do English Roman Catholics sing ‘God Save the Queen’ with everyone else? I know during the reign of the first Elizabeth Roman Catholicism was a big deal. In fact, it could result in death.
But in the 19th century came the Catholic Emancipation Acts. So is it still a big deal?