Cromwell wasn't 'offed.' Cromwell wasn't a 'mass murderer.' I'm guessing you were born too late for No Child Left Behind?
Thank you;)
It does help to read the article in full - and to remember that for 400 years, history has been written by Royalists and the Vatican.
Irish Catholics were given Cromwell as a boogy-man while the Monarchs and Popes continued to control and oppress (taxes & tythes).