Anyone immigrating to a Christian nation should be fully aware that they may NOT work to change our ways. They do not have to adhere to our faith (you can’t force anyone to believe something they don’t), but they sure as shootin’ have to keep quiet and respect it. Imagine us trying to move to the ME and demanding the country stop pushing islam on us - demanding to build churches and respect Christian holidays, etc. That would last about as long as it took to behead you.
Back to the days of schools honoring Christian holidays only, saying the Lord’s Prayer, reading from Scripture....the whole nine yards.
The Church of Rome, the Church of England, and the Church of Scotland have gone in some interesting directions over the past 50 years, so I wouldn't presume to speak for Canada. It's a nice place to visit, but I wouldn't want to live there as long as Trudeau and the World Economic Forum are in charge.
America has had a checkered history as far a religion goes. At the time of the Founding, it was an Evangelical Protestant nation. Yes, there was a Catholic colony (Maryland) and a smattering of Jews in some cities, but the predominant religious beliefs were Evangelical Protestant in nature.
With the Potato Famine, Ireland disgorged much of its population to the US. This caused a dislocation in religious belief and even riots in some cities. During the Civil War the Irish became the backbone of the Union Army's NCO corps and were largely integrated, especially when politicians learned how to harvest their votes. With this dollop of Irish Catholicism, America became a Generically Christian nation.
But that wasn't for long. When pogroms by the Catholics in Poland and the Russian Orthodox in Russia came after the Jews, the shtetls disgorged much of their inhabitants to the US. The two world wars largely integrated them into American society. That turned the US into a Judeo-Christian nation.
Until recently Catholics were the largest religious denomination in the US, but now Unbelief has become the largest, and it is also the fastest growing "religion" in the country.