Idolatry is not merely the stumbling of an immature son; it is the betrayal of a spouse.
In the previous post we saw that Israel began worshiping a golden calf at the very time that God was enacting his covenant with them through Moses on the top of Mount Sinai.
At the top of the mountain, God reported the adultery to Moses. With the fury of a husband betrayed on his wedding night, God announced, “I have seen these people, and they are a stiff-necked people. Now leave me alone so that my anger may burn against them and that I may destroy them. Then I will make you into a great nation” (Exo. 32:9–10).
God was ready to start over. Although he would fulfill his promise to Abraham by using his descendant Moses to begin a new Israel, he had lost patience with that faithless generation.
This was so because in the context of worship a different metaphor describes the relationship. In the context of worship, God was not like a father training his young son; rather, on the basis of the covenant just sealed in the covenant meal, this was a marriage. Idolatry is not merely the stumbling of an immature son; it is the betrayal of a spouse. Idolatry is adultery, the one thing a marriage should not abide.
What sex is to marriage, worship is to a relationship with God. Therefore idolatry could break the covenant.