They were invited into Ireland by Dermot MacMurrough, King of Leinster. Mostly in order to stop the almost endless wars between the various kingdoms. Wars that were ended when the Anglo Normans unified Ireland for the first time in its history.
Invited? by a guy who was exiled? a fig leaf excuse for foreign intervention, and the resultant starving and subjugation of millions so that some occupiers could have their cake and eat it too. but well, that excuses it all, does it, because an *exile* found it within himself to “invite” the british to invade ireland. you might ask the irish if they felt touched by british “concern” before blaming them for anything. i doubt you would get much more than a fist in the face from a real irishman (or a real irish woman). what-if and second guess history all you want, if that is what you call a legitimate invitation, i have a bridge in brooklyn for sale that you might be interested in buying. i am astonished by your sense of history and your lack of compassion. maybe more like disgusted.
I suppose you have figured out in your learned studies that there are more jews living outside israel than inside because the jews happen to like to travel? and that maybe, for example, maybe the polish jews were to blame for their own extermination because the kapos invited the nazis into their ghettos??
just wondering how much kool aid you like to drink there buddy...