Hmmm...try as I may, I can’t think of anything Evangelicals need to apologize for...
We need to apologize for not bowing to Rome after these atrocities
15th century: Crusades against Hussites, thousands slain.
1538 pope Paul III declared Crusade against apostate England and all English as slaves of Church (fortunately had not power to go into action).
1568 Spanish Inquisition Tribunal ordered extermination of 3 million rebels in (then Spanish) Netherlands. Thousands were actually slain.
1572 In France about 20,000 Huguenots were killed on command of pope Pius V. Until 17th century 200,000 flee.
17th century: Catholics slay Gaspard de Coligny, a Protestant leader. After murdering him, the Catholic mob mutilated his body, "cutting off his head, his hands, and his genitals... and then dumped him into the river [...but] then, deciding that it was not worthy of being food for the fish, they hauled it out again [... and] dragged what was left ... to the gallows of Montfaulcon, 'to be meat and carrion for maggots and crows'."
17th century: Catholics sack the city of Magdeburg/Germany: roughly 30,000 Protestants were slain. "In a single church fifty women were found beheaded," reported poet Friedrich Schiller, "and infants still sucking the breasts of their lifeless mothers."
17th century 30 years' war (Catholic vs. Protestant): at least 40% of population decimated, mostly in Germany.