They dont know wtf they are going to cause. We are the highway connecting the sea with europe, connecting north east europe with south west ( netherlands, germany and france together ). Poland? Ye that passes us. Spain, bet your arse. Germany? Netherlands?
Yuuuuppp.

Our roads are already filled to a god damn brim, if you stop everyone for border controls they are insane. Even more road rage and traffic jams, nice!
And yes, our airplanes have border controls…