Did the historian (Thomas Reilly?)say that before or after Cromwell's troops slaughtered about four thousand people at Drogheda including about seven hundred civilians? The Sack of Wexford saw more civilian slaughter at the hands of Cromwell's troops.
Both sides followed the same rules of no quarter after a failed parle. Reilly did say that Cromwell treated civilians far better than any military commander, Royalist or Parliamentarian, that preceded his expedition. Drogheda was a Royalist town as opposed to an Irish nationalist town.
Irish Republicans loathe Cromwell but in fact he was the first Republican to fight in Ireland, most of the people who were killed in Drogheda were Royalists and supporters of the English king.