Yep. Men, women and children over the course of a few days, pulled from their beds while sleeping and slaughtered for believing in grace alone through faith alone in Christ alone.
What about the genocide of Irish Catholics under the Puritan Protestant Oliver Cromwell in 1649-1651? More than 1/4 of Ireland’s population either died or was forced to be refugees.
Here is an example of the British Protestant attitude:
The English Parliament passed an Ordinance of No Quarter against Irish Catholics in 1642, sanctioning the killing of captured rebels.
Or what about the Puritan witch hunts in Massachusetts in 1692? Those weren’t Catholics murdering innocent people on the claims of some girls pretending to be possessed.