@finley re Poland and all that, you’re arbitrarily saying X is Catholic and Y secular. If you go by establishment/disestablishment, that’s one thing, but it doesn’t necessarily translate to social norms, and btw Poland is officially secular.
And you definitely do not need to go back 100 years to find Christianity (including Catholicism) a social norm in secular Christian (including Catholic) countries!
Even if you exclude all the minor heretical movements, you’re still about five centuries late for the Great Schism.
Why would he need to, when it was already understood?
This again? 
Ymmv.
Well no, he’s right that “Persia” under one name or another was a notable power in ancient times. But as I’ve pointed out before, he’s wrong that Iran was not Islamic during the Pahlavi dynasty.
And there still are, to this day, though there are very, very few left in Iraq, and fewer than 9000 left in Iran.