God told Nehimiah TO...build the wall.
Nehemiah 6:1. ..Now the enemy heard that I rebuilt the wall and there were no breaks, holes in it.
And the enemy made all kinds of excuses to INTERFERE with the wall.  Evil men with hearts of wickedness tried to tear down...tried to halt the wall.   Unfortified...WITHOUT WALLS you are at the mercy of your enemies that hate you.

God told Jeremiah TO...build a wall.