The completion of Jerusalem's wall leaves a profound impact on the surrounding nations. As the neighboring peoples process the event, they realize that this success is not a natural human achievement, but rather the result of divine intervention.
When the enemies confront the reality of the newly built wall, their reaction is immediate and intense. Some commentators explain that they physically look upon the finished structure with their own eyes [רש״י, מצודת דוד]. However, another tradition suggests that their response is rooted not just in sight, but in a sudden, overwhelming sense of fear and dread [מנחת שי].
This encounter triggers a severe psychological reaction among the enemies. The primary approach among commentators is that these nations experience a crushing sense of inferiority, lowliness, and a complete loss of status. Overcome with dread, the enemies despise themselves and recognize that they can no longer stand against the people of Israel. Conversely, another perspective frames their reaction as profound astonishment rather than humiliation. According to this view, the enemies are simply amazed that such a massive construction project could be finished in so little time [רלב״ג, ר' סעדיה גאון].
Ultimately, the surrounding nations are forced to admit that God is responsible for the work. This realization stems directly from the unnatural speed of the construction. The enemies understand that their complete failure to stop the building process, paired with the remarkably swift completion of the wall, serves as undeniable evidence of God's active supervision and assistance [מלבי״ם, מצודת דוד, ביאור שטיינזלץ].