This is my reply to an Irish Nationalist who pretty much damned the English to hell over the Brexit result and then called for union of the various Celtic Nations....
The EU is far from the success that you make it out to be. It has failed to stall the drop in European clout that has seen a drop in the region's Global GDP footprint from 25 to 15 % over the last thirty years or so. Many of the countries in the EU consistently demonstrate high levels of unemployment and wealth disparity in England in particular has actually widened (compare London to the rest of the country).
My biggest problem with the EU and is that it has added a layer of government that is overwhelmingly bureaucratic. This has decreased the efficacy of grassroots activism and fostered a new elite focused on entitlement. Key autonomy has been lost and this is anti-democratic.It also has created unnecessary barriers to potential imports from outside the Bloc which have been particular tough on African and Asian producers (Is this fortress Europe concept not racist in itself?) while ensuring that prices in Europe remain high (fine for the elite but not everyone else).
I am not convinced that Scotland will leave the UK (despite your wishes). I think that you are overselling the numbers. If they do so the Scots would likely have to forgo their investment in the British State mechanism (pensions and all) and drop the Pound (which is still a solid option as a currency for Third world investors particularly the Middle East). The Euro is highly volatile and has already been rocketed by several crises in Greece, Italy and Portugal to name a few. Others are likely to follow. It seems to me that your position is more motivated by an anti-English Irish jingoism than anything else although I could be wrong. Damning the English to history considering the brave stance of this people in facing Fascism in WWII is particularly galling (where were the Irish nationalists then?) .
As for your take on Northern Ireland a closer breakdown on results from the referendum indicates that the vote was split along sectarian lines with many Protestants (who regard any union with Ireland to be toxic) voting to leave. I doubt as well whether the large Scottish protestant core would also back such an alliance with Ireland in a Greater Celtic Band.