Re: ... this move into the EU effectively united ... Ireland
This is the crux of the matter. British politicians have wanted to see the back of NI for decades, and Brexit provided an opportunity to put this in motion. Fair enough some might say, given the DUP's cake and eating it approach (not part of GB, but 'Irish' - really ? ) over the years. However, I'm not sure Dublin even wants NI anymore, it being a black hole sump for public subsidies that it is.
I can't believe the DUP and allies are dumb enough not to have noticed how isolated they have become, hence the anger of some on this forum. Anyway, the wheels are in motion, give it 1 more generation and NI will probably be annexed into a federal 'Island of Ireland' federation.
In case they hadn't noticed, the DUP have been sold down the river (or Irish Sea if you prefer) by a completely duplicitous UK PM, from the 'Conservative and Unionist Party'. How ironic.