He has only ever pushed his own agenda and doesn't deserve to represent anyone, but let's not lose sight of the root of this impasse. A Conservative Prime Minister arranged a referendum in the hope of settling disagreements in the Conservative Party. He lost.
A new Conservative Prime Minister inherited the parliamentary majority she needed to see it through, but felt a general election would help her settle disputes in the Conservative Party. She lost.
To cling to power, the Conservative Government handed over the magic money tree to a fringe party, but overlooked the peculiar status of the land that fringe party came from. They now want to abandon Northern Ireland in an attempt to settle arguments within the Conservative Party.
Throwing one country under a bus seems careless, but to hand a strong mandate to independence campaigners in another makes me wonder how 'British' they want the future to be. The unifying voice of the Conservative Party.
Of course, as you can probably tell from my post, I believe Jeremy Corbyn is entirely responsible. Still surprising that the isolationist tendency are so frightened of him. His own party aren't.