John Wesley on Exodus 32:19

He saw the calf, and the dancing, and his anger waxed hot - It is no breach of the law of meekness to shew our displeasure at wickedness. Those are angry and sin not, that are angry at sin only. Moses shewed himself angry, both by breaking the tables, and burning the calf, that he might by these expressions of a strong passion awaken the people to a sense of the greatness of their sin. He broke the tables before their eyes, as it is Deu 9:17, that the sight of it might fill them with confusion when they saw what blessings they had lost. The greatest sign of God's displeasure against any people is his taking his law from them.