However much I joked up thread. I will go ahead and defend that. 1 grandparent is enough to get you Irish Citizenship. And though there’s more to it than that. In terms most recent arrivals. I have one Irish Granparent.
I have more family over there than I do over here. And I grew up in a community, and a family. Where the bulk of people around me were either originally from Ireland or recently derived from the same. 1st or 2nd generation.
The issue there. If there is one is that everyone claims to be Irish. As an ethnic identity. I once met some one who loudly and continuously identified as Irish. Purely because she had red hair. There are people in the US who can not point to Ireland on a map. And yet are Irish as can be. Because some one’s step father had a 'Mc" in their name 8 generations back. And because so many Irish spread so far around the world. For so long. Just about Everyone in the United States has some sort of Irish ancestry. And here’s the good part. However distant. Or assimilated. Or disconnected. That little bit is enough for them to not just claim Irishness. But to claim to be more Irish than you.
For better or worse we’re Americas favorite ethnic group. And everyone wants in. So they can dress in green plastic and vomit on the neighbors dog and call it heritage.