I have no problem with that, but the Brits have always practiced "conquer and divide" and THAT is what has caused this problem. There were NO Protestants in Ireland until England PUT them there!
The Catholics of Northern Ireland have a say also.
Can we all decide that if your logic applies in Ireland they apply everywhere?
What you are saying is:
Even if your ancestors have been in Ireland for 400 years, you are still not Irish. This means the million Irish in GB should be forced to go home too.
As GB put English, Scots, Welsh and Irish in North America well AFTER the protestants went to Ireland should all current American descendants go home too and leave America to the Native Americans?
Do you see what you are really saying?
Be consistent.
They did when seperation occured, the majority of the people in those areas, who had been there for generations at that point voted to stay affiliated with England. Your argument would turn the Falklands back to Argentina too. Is that where you want to go?