Hurricane re the EU:
They warned from the beginning that the UK cannot keep all the bits it likes when it Brexits
Under EU and international law, there were only ever the options on Barniers slide and he showed how May's red lines narrowed options down to Canada
Under WTO / WCO rules, they have no choice about sticking to their rules about the 4 pillars;
Otherwise they would have to basically rewrite 80,000 pages of treaties that have built up over the last 60+ years and dismantle the SIngle Market on which their prospreity depends
re the NI border:
The EU are just supporting their member, the RoI, against the country that's leaving.
As math posted, the RoI voted to change their constitution fundamentally, a part of the GFA and almost all their voters are against letting the UK abandon some of what they agreed to, because of Brexit
The UK govt assumed they'd be able to bully the RoI into agreement - May or Davies said before something like it's "not a big important country like the UK"
If the EU rolled over the RoI just to gain trade, then it would fall apart, because most members are little countries
Even apart from morality, the RoI - like any other EU member - can veto any new trade deal, so it would be pointless negotiating something they oppose
They have a lot of sympathy on the border, so probably 25 other members would veto too.
Noone says England is shit
The big problem is that those who voted Leave for English nationalist reasons want the hardest, most destructive Brexit - and don't care about the damage to the other 3 Uk nations
These are mostly very rightwing Tory voters
The govt actions are dominated not just by the DUP, but by a core part of their own vote
So English Nationalism threatens the UK