The Israeli army is building a wall to run along part of its border with Lebanon. Already having one on the Palestinian border, they will soon have one on their border with Egypt. Given the changing political climate, it is no wonder.
Throughout history, walls have been used to defend cities from potential aggressors. In the Bible, walls were the places of battle—the only thing that stood between a city and its enemies. Walls are therefore used metaphorically of security and safety (Isa. 26:1; 60:18). In America, we don't have walls around our cities, but we have walls around our homes, and walls on our borders. The walls of our houses are strong, thick, and insulated to keep things in (privacy) and keep things out (noise, heat, cold, unwanted people).
It seems to me that Israel’s actions might be used to remind The Church (the New Israel) that it must build strong walls to keep in solid doctrine and keep out worldly influence. As the last days get closer, there will be tremendous pressure for all peoples to let down their walls and move toward unity and acceptance. Christ followers will be pressured to accept religious pluralism. Metaphorically speaking, we ought to make sure we are building solid walls of truth to keep out the doctrines of demons and protects us, corporately and individually, against the fiery darts of Satan.