they knew.

Acts 19:26
And as you see and hear, not only in Ephesus, but in nearly the whole province of Asia, Paul has persuaded a great number of people to turn away. He says that man-made gods are no gods at all.

Acts 16:20
They brought them to the magistrates and said, "These men are Jews and are throwing our city into turmoil

Romans 2:22
You who forbid adultery, do you commit adultery? You who abhor idols, do you rob temples?

all.

1 Kings 18:26
And they took the bull that was given them, prepared it, and called on the name of Baal from morning until noon, shouting, "O Baal, answer us!" But there was no sound, and no one answered as they leaped around the altar they had made.

Matthew 6:7
And when you pray, do not babble on like pagans, for they think that by their many words they will be heard.

Great.

Acts 19:28
When the men heard this, they were enraged and began shouting, "Great is Artemis of the Ephesians!"

Revelation 13:4
They worshiped the dragon who had given authority to the beast, and they worshiped the beast, saying, "Who is like the beast, and who can wage war against it?"