Why did Jesus call his own people 'adulterous'? It's a harsh word, but it speaks volumes about their spiritual state.
Jesus' audience, particularly the religious leaders, were a generation unfaithful to God. In the Old Testament, God often described His relationship with Israel as a marriage covenant. When they turned to other gods, practiced idolatry, or were morally corrupt, it was seen as spiritual adultery.
This wasn't just a metaphor; some scholars point out there's evidence of literal marital unfaithfulness too. But the core meaning here is their betrayal of their covenant relationship with God. They were seeking signs, not out of genuine faith, but as a way to test and potentially dismiss Jesus, proving their unfaithfulness.