The only reason Marine LePen has been able to make such a triumphant re-entry into France’s political system is because France’s current ruler, Emmanuel Macron, has been such a spectacular failure.
Similarly in England, Boris Johnson’s imminent rise to become Britain’s prime minister has resulted from the spectacular failure of Theresa May.
What good is democracy if a country’s voters are too stupid to stop electing bad leaders?
I would point out that "Democracy" is Mob Rule, and it does not preclude Stupid Mob Rule.