The EU membership predates the GFA too. The GFA was able to be out in place in part thanks to the existence of both the CTA and the EU.
Do you think that if it worked the way you thought it did, there would be such a furore over the situation? I'm not saying UK MPs are the smartest bunch of people but if Brexit would leave the GFA untouched then surely they would have worked that out by now.
My honest opinion is that the NI/Ireland border is an important issue, and the GFA is an important agreement, but they are not the only important issue and the only important agreement. I think Brexit is a divisive issue, and as a matter of political convenience a certain part of the political world and the public have latched onto the Irish border issue to the exclusion of almost all other considerations, with the effect that the tail has been wagging the dog. And I think this has closed minds and has adversely affected the negotiations and will ultimately result in worse outcomes for all parties, perhaps most of all those living and working near the NI/Ireland border. I find all of this deeply regrettable.
Do you think that if it worked the way you thought it did, there would be such a furore over the situation? I'm not saying UK MPs are the smartest bunch of people but if Brexit would leave the GFA untouched then surely they would have worked that out by now.
Perhaps you are wrong.