Why did the Marquis de Lafayette resign from command of the National Guard in 1791?

The Marquis de Lafayette resigned from his command of the National Guard in October 1791 following a significant decline in his popularity.1

His standing was severely damaged by the events of July 17, 1791, at the Champ de Mars in Paris. During a demonstration where citizens gathered to demand the abdication of King Louis XVI, Lafayette ordered his guards to disperse the crowd. The resulting confrontation led to the guards opening fire, which killed or wounded approximately 50 demonstrators. This violent incident alienated the public and eroded the political influence he had previously held as a leader of the French Revolution.123