When we make an idol, we get to pick and choose what we want that god to be. What we wind up with is a distortion of truth about God. It matters what we believe about God. It matters what God we worship. We become like the God we worship.
False gods make false people.
Satan deceived Adam and Eve into believing a lie about God. He convinced them that God did not want the best for them. That is why He forbade them to eat of the tree of the knowledge of good and evil. He knew that when they ate of it, they would become like Him. So He jealously wanted to protect His own power.