The religious history of the Reformation is a lot more complicated than the simple minded "Calvanists versus Catholics" view of Conservapedia,
e.g. why, after 1650, was the Presbyterian church supporting Charles II against Cromwell?
I am not sure why Conservapedia is a “ROFL.”
I am no expert on English history or Cromwell. I do know that Cromwell was a duly sanctioned leader of the troops, authorized by Parliament to basically lead their side in a civil war. Which he is credited with winning. I am sure the losing side was quite bitter about it. There were probably atrocities on both sides. How much any individual leader is responsible for those atrocities is a matter of debate.
I repeat, I do not defend war crimes by any party. I would just like to point out that in war, innocent people are killed. That is not ok with me. It is just the way it is. To blame Cromwell exclusively for that fact is not reasonable. Again, he did not start this war. He just finished it.