I know what living near a dividing wall (and a big one) is like.
I lived in Berlin (West), in 1983-84, in Gropiusstadt, serving as an intern at the Martin-Luther-King Kirchengeminde. (yes)
Die Mauer –(the Wall), of course, surrounded the entire city of 2 million, making it a virtual island. It kept us all out of the German Democratic Republic. And it kept East Germans from entering West Berlin.
Though some tried to get over, under, through the wall, 138 were killed trying (from 1961-1989.)
This is the message of a wall. If it is there, people will work to overcome it, one way or another.
God in Christ does not seem to like walls. At all.
The hostility that exists between us is already broken down in Christ, accomplished long, long ago.
… to live out the peace God freely gives us is what Jesus asks…
… in Christ Jesus you who once were far off have been brought near by the blood of Christ.
For he is our peace; in his flesh he has made both groups into one and has broken down the dividing wall, that is, the hostility between us.
… you are no longer strangers and aliens, but you are citizens with the saints and also members of the household of God, built upon the foundation of the apostles and prophets, with Christ Jesus himself as the cornerstone.
Ephesians, chapter 2, selected verses….