A profound loss of national identity and a deep descent into spiritual and cultural assimilation stand at the heart of the prophetic rebuke. The nation is portrayed as having lost its unique path, allowing itself to be flooded by foreign influences from every direction while entirely abandoning its original heritage.
There are different perspectives on the nature of this abandonment. One approach suggests that the prophet is speaking directly to God, justifying the fact that God has left His people. Because of their sins, they lost the privilege of being called His nation [מלבי״ם, מצודת דוד, רד״ק, אבן עזרא, אברבנאל]. Conversely, another view argues that the rebuke is directed at the people themselves. They are the ones who walked away from their destiny, abandoning God's path and the good deeds that once made them a special nation [רש״י, רד״ק, שד״ל, ביאור שטיינזלץ, אבן עזרא]. A third, more specific perspective views this as a criticism of the Kingdom of Israel for turning its back on the people of Judah and embracing idolatry [אברבנאל].
The root cause of this fracture is the nation's absorption of foreign customs from all sides, specifically from the Arameans in the east and the Philistines in the west [מלבי״ם, רד״ק, שד״ל]. The primary approach among commentators is that the people were heavily influenced by Eastern cultures, though some explain that they actually reverted to the ancient practices of the Canaanites, returning to their past impurity and idolatry [רד״ק, אברבנאל]. This foreign influence manifested in two main ways. First, the people filled themselves with outside wisdom and philosophies [אבן עזרא, ביאור שטיינזלץ]. Second, they adopted dark arts, engaging in magic, divination, and astrology, mirroring the practices of the Philistines [רש״י, מצודת ציון, רד״ק, אברבנאל].
The absolute peak of this assimilation is seen in how the people chose to satisfy their needs. Commentators present two main ways to understand this ultimate betrayal. The practical approach explains it as physical assimilation. The people married foreign women and raised families with them, becoming entirely consumed by these relationships and destroying their unique national lineage [מלבי״ם, רש״י, אברבנאל]. The conceptual approach, however, views foreign offspring as a metaphor for new thoughts and ideas born in the heart. The Israelites became fully satisfied with the wisdom, philosophy, and social manners of the surrounding nations. They believed that foreign morality was entirely sufficient to guide their character, leading them to disrespect prophecy and abandon God's Torah [מצודת דוד, מצודת ציון, רד״ק, אבן עזרא, חומת אנך, ביאור שטיינזלץ]. An additional interpretation highlights a pursuit of luxury, noting that the people preferred the services and products of foreigners, believing that only imported goods were worthy and sufficient for them [שד״ל].