Most economists seem to agree that the EU could make a LOT more concessions with it still being a win compared to a hard Brexit.
So in effect consensus seems to be that the EU is risking a hard Brexit in the same way you do: threaten the British public with exactly what they voted they wanted, in hopes of achieving the opposite (no Brexit at all).
Furthermore: negotiations do not appear to be all that friendly. E.g. https://www.ft.com/content/9c59a204-fc6d-11e8-aebf-99e208d3e... as to how enthousiastic Irish citizens are about this particular problem, read this https://www.ft.com/content/ec894272-18db-11e9-9e64-d150b3105...
I think it's clear that I think this is dishonest, putting the interests of politicians ahead of those of the population, and to boot it's risky. The EU population does not want this at all, quite the reverse. They want trade with the UK to be as unaffected as possible, which of course means a trade deal that's as favorable to the UK as possible. Second the EU population certainly does not want to eat the economic hits that a hard Brexit would bring and expects their politicians to prevent this scenario.
I fear that if an election is called in the UK, which is the almost inevitable outcome of delaying or stopping Brexit, the end result will be a disorderly "fuck you" Brexit when conservatives gain another 10% of the vote with a promised firm hard Brexit negotiating stance. At that point Ireland, and perhaps France will suddenly find that the Euro is a serious impediment to their ability to react to limit the damage, and London will be able to adapt. This will further amplify the already anti-EU parties in France, Italy and Germany, and at this point it won't take much to force centrist parties in both countries to become anti-EU and propagate further.
An additional worry is that we're 10 years into the best economic situation we've seen in Europe in >50 years. This is the situation we're in, with essentially the best possible economic background. That at some point the economy will turn is inevitable, and it will further amplify anti-EU stances like it always does. If politicians find a way to combine both forces to hit at the same time, I don't even want to try to predict what could happen.