BAS was referring to the UK, where NI (sorry the DUP) demands to be treated as an integral part of UK, but wants to retain its differences in the bits that it perceives as morally, politically, legally and religiously different.
I suspect you can see the irrationality of that. I assume you are fully aware that DUP want to retain the full integration of NI with UK? NI is a province, not a country. It has never been a sovereign independent country.
They're moral, political, legal and religious issues. And the people that are subject to them are all UK citizens.
For example, it is illogical that a UK citizen in one part of the union is allowed same-sex marriage (with all the legal implications that follow), but in other part of that same union it is not allowed.