And Moses said unto Aaron, What did this people unto thee, that thou hast brought so great a sin upon them?
21. What did this people unto thee? He casts the blame on Aaron, inasmuch as he, who is possessed of power, seems to permit the evil which he does not prevent. We have previously seen that when Moses went up into the mount he resigned his charge to Aaron; it was therefore his duty so to preside over them as, in right of his power...
Moses begins with Aaron, not ordering his death like the ringleaders, because there is a world of difference between those who rush headlong into sin and those surprised by infirmity into it. Aaron deserved to be cut off, and would have been, except Moses interceded for him; now he calls him to repentance, showing him he hardened their hearts and strengthened their hands in idolatry.
AI summary
Commenting on Exodus 32:21-29
And Aaron said, let not the anger of my lord wax hot,.... He addresses him in a very respectful manner, though his younger brother, being in a superior office, the chief ruler of the people, king in Jeshurun; and he perceived a violent emotion rising in him, great indignation in his countenance, and an high resentment of what was done, and therefore he entreats his...