Which is a good cue for asking how the stats quoted so far were arrived at, what they include not do not include, & whether they are accurate. People with an axe to grind seldom under-estimate the body counts for which they have not been responsible.
Well, Holocaust numbers are difficult to quantify exactly (beyond, say, ‘Before the Germans arrived, the Jewish population of Country X was Y, after the Germans were evicted, the Jewish population of Country X was Z’) and that’s only last century with a compulsively organized and bureaucratically exact people like the Germans.
Going back centuries, it’s inevitable that being ‘exact’ is more difficult - one of the reasons I questioned the ‘slavery’ numbers is that the idea that the mid-17th Century English had shipping resources to have physically transported 300,000 people in that time is a little beyond belief - my guess is that the total ‘slavery’ figure is ‘romantic’ - most of those people were dead.
Who knows or can know what even the ‘round numbers’ of Irish who succumbed to war, massacre, famine and plague was and does it really matter to us now? When we talk about these great tragedies, we sometimes get lost in the total numbers - whether 5 million or 6 million or 7 million Jews died in the Shoah mattered greatly to those people and their surviving families but the figures are, in another sense, ‘incidental’. At those sorts of levels of loss, the exact numbers are incidental to the social/cultural catastrophe that a people suffers - and, it’s clear that, on several occasions, Ireland suffered such catastrophes.
As an outsider, what I do rather question is the attribution of guilt - just who was to blame? ‘The English’ is pretty meaningless - to somebody who avoids blaming ‘The Germans’ because it hides the guilty amongst the innocent, anyway.