Originally Posted by
EalingGreen
You confuse "Irredentism" amd "Citizenship".
An example of the former was when the Irish Republic Government claimed territorial jurisdiction over Northern Ireland, even despite such a claim being nowhere recognised under international law. (In that respect, it was a little like eg Turkey claiming jurisdiction over Northern Cyprus.) Anyhow, this irredentist claim was removed as part of the GFA negotiations, which the population of Ireland North and South (including myself, btw) supported overwhelmingly.
As for Citizenship, it is open to any Nation State to grant citizenship to whomsoever it likes, for any reason or none. This basic principle was unchanged by the GFA, other than the Government of the UK specifically acknowledged that right, rather than tacitly accepting it, as previously.
Personally, I always thought the former Irredentism of the Irish Republic to be unwelcome, unhelpful and even marginally offensive. However, I couldn't care less about their Citizenship policy (aside from the way that the FAI uses that anomaly to exploit FIFA's eligibility criteria to select players who were not born within their own jurisdiction and who also do not meet the additional parent/grandparent/residence criteria which apply to players born outwith the jurisdiction of every other of FIFA's 207 Member Associations)