When facing God after committing severe wrongs, the foundation for seeking forgiveness cannot be personal merit. Instead, it must rest entirely on the nature of the Creator. Mercy and forgiveness are traits that belong exclusively in His hands [מצודת דוד]. The actions committed were not mere mistakes or accidental missteps; they were deliberate, intentional acts of absolute rebellion [מלבי״ם, יוסף אבן יחיא, אלשיך].
There are several ways to understand the relationship between this deliberate rebellion and God's mercy. One perspective focuses on sheer survival. Because the actions were intentional, strict justice would normally demand complete destruction. The simple fact that the people were not wiped out is clear proof of God's mercy [רש״י, יוסף אבן יחיא]. Without this divine forgiveness, they could not have continued to exist [מצודת דוד].
Another perspective emphasizes the complete lack of personal merit. Someone who does wrong by accident might naturally deserve some level of understanding. However, deliberate rebellion erases any such claim. Consequently, the mercy granted belongs entirely to God, who chooses to forgive for the sake of His own honor rather than because the people have earned it [מלבי״ם]. In such a vulnerable position, the only option left is to simply plead for His mercy [ביאור שטיינזלץ].
Conversely, a different approach suggests that the severity of the rebellion is exactly what highlights the magnitude of God's mercy. Rebellion is the ultimate offense, an act one might assume is entirely unforgivable. Yet, the fact that God is willing to forgive even the most severe betrayal serves to prove and reveal to the world the profound, unique power of His inherent mercy [אלשיך].