The image is very powerful.
Moses and the Levites said in a loud voice: Cursed is the person who does such and such thing against G-d (several times).
And the people of Israel answered altogether “Amen” (several times), validating what Moses and the Levites said.
Sometimes we agree with what has been said, not because of the content but because of the authority of the person who said it.
Our task is not to question the authority of Moses or the Torah, but to question whether we are saying Amen to words we have not seriously thought about and are just agreeing with because of the authority of the person who spoke them.
In memory of my beloved mother and teacher Miriam Rachel bat Israel Itzchak Z"L