A late attempt to correct a profound spiritual failure often meets a harsh reality. The Israelites' sudden burst of courage to enter the land cannot undo the damage caused by their recent rebellion. Moses warns them that marching forward without God's guidance will only lead to a devastating defeat against the forces waiting for them. The Amalekites and Canaanites are already stationed on the road, fully armed and prepared for battle [ביאור יש״ר, ביאור שטיינזלץ]. The presence of these specific nations reveals a tragic irony. The people's initial rebellion was born out of a deep fear of these very nations and a dread of dying in combat. Because this fear caused them to lose their trust in God and retreat, their worst nightmare will now become a self-fulfilling prophecy, and they will fall to the very enemies they tried to avoid [אור החיים, חזקוני].
While repentance generally serves as a shield against disaster, their current regret is not enough to save them. Overcoming such powerful, entrenched enemies requires an open miracle and supernatural intervention. However, because their earlier sin involved desecrating God's name and a direct refusal to follow Him, their partial repentance cannot earn them a miracle. Consequently, they are left completely exposed to the natural, brutal dangers of the battlefield [העמק דבר].
The primary approach among commentators is that this impending disaster is a direct result of the people straying from God's path, while others emphasize that the tragedy unfolds precisely because they chose to turn back [בכור שור, חזקוני]. This distancing from God is not merely a lack of reverence in their hearts; it represents an active abandonment of serving Him [נתינה לגר]. As a direct consequence of this profound disconnection, God removes His divine protection and assistance. He will not accompany them on their journey, leaving them to face the consequences of their rebellion entirely on their own [ביאור יש״ר, ביאור שטיינזלץ].