It became more tolerant and more docile once it was not mixed with power anymore or at least not nearly as before. Darn it, some languages like Italian even created something I am not even sure how you translate it in English (Bestemmie) in very very colorful ways so heavy was the political / temporal arm of the Catholic Church.
Europe forgetting the lessons of the past, how you have modern Christianity and those moderate values, is a Europe that could go back to the early kind of extremist Christians you would love about as much as you seem to love the other side extremists too.
All the religions of the book comes with potential for very very very very acute extremism and that results in oppression.
Look at very Christian south of Italy 80-120 years ago and you will find a society closer to what effectively fundamentalist Christians would go back to… hint: veiled women (for the same reason) and women as second class citizen is part of that too

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Becoming the enemy to defeat the enemy… seems… NIH preference at best.
Reneging / Undoing the conquest of Humanism and Illuminism is woke right… where the two woke sides meet I guess…