You do, indeed. But even your parochial position is less splendid than you appear to think.
You seem to forget that A. Ireland had already been conquered by the Tudors, B. the Irish eventually allied themselves with Charles I in the English Civil War. Charles lost and so did his Irish allies who had raised an army to invade England, and, regarding Drogheda, in accordance with the law of seige at that time, Cromwell gave Drogheda an opportunity to surrender to prevent any bloodshed. Instead of surrendering Drogheda refused, knowing full well, as did everyone at that time, that the consequence of a refusal meant that everyone’s life was forfeit if the walls were breached. The refusal of Cromwell’s offer of clemency forced him to assault the city with great loss of life on the part of his soldiers, and his surviving soldiers killed many soldiers and civilians. The Irish gambled and lost, both with Charles and at Drogheda.