That is a great, but profoundly depressing article. In fact, I think she's been reading these threads, especially the facts she's been trying to get across:
"That many people along the border don’t recognise it as legitimate. That people’s houses and farms are built on top of it. That people’s lives are lived straddling it. That Northern Ireland is in a delicate post-conflict situation, is the poorest part of the UK, and is set to be economically worst hit by Brexit. That paramilitaries are still active, still recruiting, and many would love a chance for glory. That a majority in Northern Ireland voted to remain in the EU. That the entire Brexit saga has been a long morality play demonstrating to those with qualms about Northern Ireland’s place in the UK that Britian knows little about the province, and cares less.
I explain that the options are either to have an open border, or a deeply dysfunctional border that is probably violent and definitely a smugglers’ paradise. This border has about 300 crossings over its 300 miles. It is the deeply impractical result of political logic, designed in the 1920s in the interests of preserving a unionist majority within its confines. That in the worst years of the troubles, a fifth of the British Army’s manpower in Northern Ireland was dedicated to trying to police the border, and they were unable to do it."
There is more, but that's the bit that May and the British government don't seem to understand.
A peaceful land border is not possible.