Alma 46:7

And there were many in the church which believed in the flattering words of Amalickiah; therefore they dissented even from the church; and thus were the affairs of the people of Nephi exceeding precarious and dangerous, notwithstanding their great victory which they had had over the Lamanites, and their great rejoicings which they had had, because of their deliverance by the hands of the Lord.

Many people in the church believed Amalickiah’s nice words. They left the church. This made things very dangerous for the people of Nephi. This happened right after their great win over the Lamanites. They had been so happy because the Lord had saved them.

Even church members fell for Amalickiah’s flattery and left the church. The whole nation was suddenly in danger—and this after their great victory over the Lamanites, after all their celebrating about how God had delivered them.