And they do have an over-immigration problem in Dublin and Belfast. We didn't spend much time in either city so I'll caveat my comments with that, but as beautiful as the countries and the people are in all the rural areas and small towns, Dublin especially is awful. What's happening in Belfast is going to be happening in Dublin.
The streets are lined with recent immigrant families and their belongings. They are either begging for food/money or lined up for free food from the various charitable organizations trying to keep people from starving. It's tragic. Too many immigrants too fast with no serious plan to house, feed and assimilate them into the workforce is the problem, not immigration itself.