The Cathars and Gnostics did.
"Soul of a Bishop" by H. G. Wells
Italy may well be grateful to St. Francis; it was as much infected with Catharism as Languedoc, and it was he who wrought its purification.
"Life of St. Francis of Assisi" by Paul Sabatier
Who has not heard of the Cathars or Albigenses of the Middle Ages?
"The Next Step in Religion" by Roy Wood Sellars
The influence of Catharism on the Catholic church was enormous.
"Encyclopaedia Britannica, 11th Edition, Volume 5, Slice 5" by Various
The Cathars used only the Lord's prayer in consecrating the bread and used water for wine.
"Encyclopaedia Britannica, 11th Edition, Volume 9, Slice 8" by Various
Catharism had no possibility of development, and in that lay its doom.
"A History of The Inquisition of The Middle Ages; volume II" by Henry Charles Lea
Fact-Checking Damsels in Distress: Were the Cathars Really Sodomists.
But another odd claim in Damsels doesn't get a fact-check: Xavier, the Frenchman and avowed Cathar , suggests that "the Cathar way" of love is anal sex.
This would pave the way for crusading against heretics, as Innocent would later do in the Albigensian Crusade against the Cathars.
Readers of Le Roy Ladurie's brilliant book Montaillou will have met the inquisitors of the heretical sect of Cathars.
Historical mini explores Cathar massacre.