Suffering and captivity are not random events that strike without reason. They are the direct result of rebelling against God and rejecting His guidance. The primary approach among commentators is that the calamities and imprisonment people experience serve as a punishment for their sins, born out of a deep contempt and absolute disrespect toward God [מצודת ציון, שטיינזלץ].
When considering what exactly these individuals rejected, there is a general consensus that their rebellion was not merely against specific religious laws given to the Israelites. Rather, they violated the basic moral laws and rational principles that God planted within the heart of every human being since the dawn of humanity [רד״ק, אבן עזרא]. Beyond these universal morals, the rebels also ignored God's fundamental advice. He guides people to follow His commandments in order to secure a good life, and rejecting this guidance naturally brings about illness or captivity [רד״ק].
This divine advice also represents a profound choice between two paths in life. One path appears wide, easy, and pleasant, but ultimately leads to destruction. The other path seems narrow and difficult, yet it leads to true life in the world to come. God, in His kindness, advises humanity to choose the path of life. However, when people become arrogant and chase after the temporary pleasures of this world, God distances Himself. He then brings them into confinement to break their pride and humble their hearts [אלשיך].
Looking at the broader sequence of events, this divine counsel reflects God's ongoing relationship with these individuals. In the past, God performed miracles for them and saved them from earlier troubles, hoping they would return to Him and follow His ways. Instead of accepting this guidance, they returned to their sinful habits. As a result, God brought a new hardship upon them, subjecting them to imprisonment and hard labor. The ultimate purpose of this severe intervention is to humble them completely, prompting them to cry out to Him and achieve a sincere and total return [מלבי״ם].