Sorry, Ruadh, I was indeed picking nits, but I was partly trying to make a serious point: it is a principle enshrined in the Constitution that “all actions … of … States” should be referred to “the Most Holy Trinity”. Although this doesn’t interfere with the individual rights of people who do not believe in the Trinity, it does give a certain amount of ammunition to the Ian Paisleys of this world when they want to argue that the RoI is a religious state (FWIW, my own view is that it is less of a religious state than the UK).
Of course, if the words had no practical effect, it would be but a small matter to change them and head off that kind of criticism :).
To take APB’s points in order:
(1) Ethnic origin: Depends entirely on what you mean by “ethnic”. My feeling is that ethnicity arguments almost always end up being circular.
(2) Language: In practice the first language of the vast majority of RoI and UK citizens is English, so the argument falls. Incidentally, the NI Protestants also claim to have their own language, which they call Ulster Scots. As far as I can see, though, it’s just a dialect of English.
(3) Cultural identity: Varies at a much lower level than the nation-state. FWIW, I think that the people of NI have much more in common with each other culturally than they do with the people of GB: same language, history, newspapers, sports, TV programmes, etc.
This begs two questions: By whom and for what purpose? As you rightly point out, the treatment of Ireland as a single administrative unit was the product of British rule, before which Ireland consisted of a number of more or less independent kingdoms (as did England before the Norman conquest). The same applies to India and Pakistan, but nobody would suggest that the two countries should be merged for that reason.
In other words, there has never been an independent sovereign state whose territory extended to the entire island of Ireland.
(7) Aboriginal rights: Depends what you mean by “the Irish”, see point (1).
(7A) Geography: I’m not sure where the idea that an island should form a single state ever came from (a sinister cartographers’ conspiracy, perhaps?), but it’s clearly baseless nonsense.
Incidentally, if Wales or Scotland were to become independent, it would not be from England but from the UK. Contrary to what appears to be the settled opinion of many Americans, Scotland and Wales elect Members of the UK Parliament (the Scots electing more per capita than Wales or the England). Three of the four most senior positions in the UK Government are held by Scotsmen (Lord Chancellor, Chancellor of the Exchequer and Foreign Secretary). The Fourth (the PM) is not Scottish but he did go to school there.
Scotland is governed by England only to the extent that England is governed by Scotland. It happens that the population of England is greater than that of Scotland or Wales and so elects more MPs in absolute terms, but you might as well argue that Alaska is governed by California since the latter elects more Representatives and has more votes in the Electoral College. If the UK were to be broken up, it would be a moot question who was getting independence from whom.