Most people in Europe I would guess have little interest in Brexit, certainly no-one I know who is not English except the odd "Brexit, hahahaha, those English are mad".
Most of them won't be affected by it.
To have the flights working there has to be an agreement and since no-one has a clue what the UK want, it becomes difficult to come to an agreement.
If May had said from the early days of negotiations what they want without the stupid posturing and cherry picking, talks would be far further forward.
And here we are 6 months before the UK leave and still she's trying to cherry pick and the whole world except her knows it is not going to work.
I agree it sounds insane that it could come to that, but has anything been remotely sane in the last couple of years.
Sticking ones head in the sand and hoping the Irish border problem will magically disappear is not really a sensible strategy.