Europe became a really unstable, unpleasant place from about 1520 onward--but they cleared that all up in 1992 . . . i think . . .
Hold your horses, pardner. That year, 1520 rings a bell. Oh yes, Martin Luther nailed his complaints onto a church door, and started the Protestant Reformation. You use the word "unpleasant." Unpleasant for whom? For Catholics that were the only game in town previously? For those that subscribed to the new beliefs of Protestantism, it might have been quite pleasant, since for the first time Christians could have a personal relationship with Jesus, directly, having the Spirit in one's heart.
I do wonder if many non-practicing Catholics, that were originally raised in the Catholic faith, lost their faith, but they still see Protestants and their faith as an alien community. God, if Jews were as alienated from Gentiles, as many Catholics, believing, or non-believing, are from Protestants, then Jews would all have to move to Israel.
I say this as a New Yorker that has observed the high parochial school participation rate of New York Catholics, back when all parochial schools were white Catholics. And, people talk of clannish Jews.