Well call me confused, because I'm not sure where you are going with that statement?
The only thing I can think of is perhaps Foxe's Book of Martyrs which tells the story of the over 50 million Christians the RCC slaughtered during her reign of terror between 538 - 1798. You might want to go read it sometime, quite the eye opener. Makes supposed blasphemy by protestants pale in comparison.
50 million, oh my gosh what an astounding lack of historical accuracy.
As to the martydom Protestants also killed in the name of religion. Both were wrong. We just forget that heresy was a crime against the state (treason) and therefore punishable by death.
Foxe includes the Albigensians in his list of martyrs. They were Cathars and as such taught and practiced Gnostic heresy. I’ll be generous and believe Foxe was ignorant of this but any orthodox Protestant who knew what Gnosticism was would reject this heresy and not defend the Cathars’ beliefs.