During the Reign of Terror, free speech and religion were completely irradicated. With these being part of documents (dec. of rights of man, dec. of independence) that took direct inspiration from the Enlightenment, getting rid of these freedoms contradicted it. The natural rights (life, liberty, property, but mostly life lmao) were not adhered to and it lead to hundred (thousands) of deaths of innocent people. The dictatorship that Robespierre ran did not support democracy (the Gov. supported by the Enlightenment), had no checks and balances, and valued to crowd over the individual (anti-individualism).