Yahweh struck the people because they made the calf, the one that Aaron made. Bible

“they made the calf, the one that Aaron made.” This sounds a little strange to us in English, but it expresses a powerful truth, especially when we understand the history of the golden calf. Moses had been gone for some time, and so the people came to Aaron, who was in charge, and told him to make them gods, ostensibly to “go before us,” and thus lead us into the Promised Land (Exod. 32:1). However, given the thousands of gods of Egypt, it was no accident that a calf god, a fertility god, was chosen, because the worship of it then involved the people in sex, which they almost certainly wanted anyway (see commentary on Exod. 32:6, “play”).

From God’s perspective, it was the people who pressured Aaron into making the calf, and they are responsible for that. Thus, they “made the calf.” However, Aaron actually was the one who took the gold from the people and fashioned a metal calf from it. The Hebrew text is written in such a way that both parties are guilty of the sin of making an idol.

Commentary for: Exodus 32:35