Dont forget why Cromwell had to invade in the first place: The other half of Ireland was being cleansed by the Catholics first!
Huh? Ireland had been peacefully cleansed of paganism by St. Patrick 1200 years earlier. After that, it became known as "the land of saints and scolars" and sent out waves of Christian (Catholic) missionaries which helped bring about the peaceful conversion of mainland Europe to Christianity (Catholicism).