30 Year's war saw 20% of Europe's population die and was a conflict between Catholics and Protestants. If you want a more recent example, Northern Ireland was the site of a religious terrorist campaign by both Protestants and Catholics, killing 3,600 from 1950 to 2000. The conflict was resolved in 1998, and involved British soldiers, Irish paramilitaries bombing both the British mainland (I live only 20 minutes away from a place that got bombed) and Northern Ireland itself, billions of pounds, an attempted assassination attempt on a British Prime Minister and tensions in the region that last to this day. The most recent attack from the region was a mortar attack on police in 2022, and there was an attempt to bomb Joe Biden on a visit to Belfast in 2023. That's just Northern Ireland. If you want to engage in blind historical revisionism, at least know your facts.