No-one voted for the deal that TM was allegedly discussing, especially not NI who voted to remain.
So, in a way, what TM was discussing was a compromise for NI, except the DUP scuppered an acceptable (to the majority of NI) deal.
What is it that you dont understand?
The UK had a referendum, it voted out end of
There was no NI voted to remain, there were no regional divisions in the referendum.