The people’s of Judea had the laws of God, they were accountable to them, and yes l, Sodom would rise to scream condemnation because it would not seem fair that a city of believers would go uncondemned while they were condemned.
Only fly in your version of the ointment is that this would be a glee, not a woe, to those Hebrew cities. They’d feel so smug and superior. Jesus is saying to that idea: NOT.