Not bluster. I am telling you that, as someone whose brother was actually in the Tavern in the Town when the bomb went off, your ignorance on the subject won't get us anywhere. The consequences of this are very, very real, he still suffers 40 years later, this is far too important for your nonsense, because I would not wish what we went through on anyone.
It is not the IRISH problem, they did not vote for anything, it is the UK problem, we voted for the change.
If you want to take control of the borders, you will want a border there, our only land border with another country.
If you leave it open, then you have not got control of the borders and anyone, anyone at all, can cross directly from the EU into the UK as they wish, negating the big selling point of brexit.
It is a circle you cannot square, and it is entirely a problem that was predicted and warned about pre vote. It is our problem as a country, and brexit ministers in particular, to resolve. No one elses.