I too am saddened. At one time, the greatest export from Ireland was the Irish themselves. Those were the olden days, Mrs. Tax.
Prosperity changes everything. I knew something was afoot when, some years back, the young woman who called me from “my local bank” was actually a “colleen” calling me from Dublin...no joke! The “back rooms” and checking services of most banks were then in Ireland. I guess things have gone far past that now.
As a generalization, when a country is exporting its young people, something is wrong with the country. A country should provide opportunities for its citizens. Religious or economic missionaries are an exception, as they are accepting deprivation in order to impove the lives of others.
Marxism/socialism is bad, wherever it exists, and the IRA is Marxist. On top of that, there seems to be a global confluence of dead-end terrorist organizations, whether they explicitly subscribe to Marxism or not.