Jeremiah is called to witness acts of blatant idolatry. God doesn't just see these sins; He uses their public nature as a key reason for His judgment.
The verse opens with a direct challenge from God to Jeremiah: "Do you not see what they are doing?" This isn't a question of ignorance, but an invitation to observe the obvious. The idolatrous practices were not hidden in secret corners but were happening openly "in the cities of Judah and in the streets of Jerusalem." This public display of rebellion was a profound insult to God's name and covenant. It showed a complete lack of shame and a defiant disregard for His authority. When sin becomes public, pervasive, and unashamed, it escalates beyond personal failing to a communal affront, inviting a corresponding public and severe response from God. The commentaries highlight that this open defiance was a sign of a people "past remedy," whose sins were so evident they could not be denied, and whose impudence invited judgment.