Re: Well
That would make the RoI/NI border an EU issue then
The RoI/NI border is an RoI/NI problem, hence and RoI/UK problem. The UK has decided to leave the EU, and they knew that there is an external border to the EU which is controlled. The UK was a party to the Good Friday agreement, and is now reneging on it's commitments in that by leaving the EU (and EEA/EFTA etc) and forcing there to be an external EU border between RoI and NI, so it's the UK's responsibility to find a way to resolve this.
The EU didn't kick us out, we chose to leave, and must accept all the consequences of that.