Well, it’s different in that after Cromwell took over Ireland, he killed two thirds of the Irish. The population of native Irish dropped from 1.5 million to 500,000. He transplanted Scots and other Brits to Ulster. Surprise! They later voted to stay with Britain.
It was ethnic cleansing. Genocide.
You've moved back from the Potatoe Famine, to Cromwell now?
What happened then, happened then. What happens now is about people who have lived in their homes for generations and who CANNOT be held respobsible for their Ancestors any more than you or I.
How about I tell you to get the heck out of America or forfeit all your rights of democratic input because your ancestors treated the native americans roughly to build the current status quo. On that basis what legitimacy does the US government have? After all it just pulled in immigrants from everywhere, ethnically cleansed the native American lands through a combination of unintentional spread of disease and intentional land grabs and forced relocation. Why don't you get the heck out of America and make the Natives free.
If that argument sounds stupid to you, that is exactly what you seem to be arguing re Ulstermen. (though you are now going even further back in history).
GET THE NORMANS OUT OF BRITAIN. MAKE THE SAXONS FREE!