Why did Jacques-Louis David hide The Death of Marat after 1794?

Jacques-Louis David hid his painting The Death of Marat after 1794 because the political climate of the French Revolution had shifted significantly.1

Following the fall of Maximilien Robespierre—the revolutionary leader whom David had closely supported—a reaction against radicalism took hold in France. As public opinion toward the radical activist Jean-Paul Marat changed, David feared that his masterpiece, which served as a powerful symbol of the Jacobin cause, would be destroyed by those now in power. Consequently, he concealed the work to ensure its preservation during this period of intense political instability and personal danger.1