Perhaps we are all idolatrous. Nowadays, people worship images of God in their mind.
In ancient time, idolaters are people that make images of God or gods. Just like ancient people craft statues and call it God. Now, our religious leaders craft images of God in our mind and tell us that’s the true God.
I know those are just images because different people have different images.
In Christianity, God is a triumvirate. In Judaism, God is one. In Hinduism, God has many theories.