Explanation: Oliver Cromwell was the ruler of the UK after the execution of their king, during which a short-lived military dictatorship was instituted in place of a monarchy. He was a Puritan, a member of a strain of Protestant Christian belief in the early modern period which regarded much of then-modern society as decadent and corrupt.

One of their targets of ire in particular was... Christmas. For being too celebratory and self-indulgent. And Catholic.