How did Florent's naivete lead to his downfall?

The narrator's assertion in that "Florent lived in a world of illusion" is further substantiated in the final chapter of The Belly of Paris (175). The character is completely unaware of what is happening around him until the moment of his arrest. Gullibility leads Florent to believe that the others from Monsieur Lebigre's are actually in agreement with his plan to overthrow the Empire. Florent simply thinks that people are gossiping and saying unkind things behind his back. The reality is that the people in Les Halles hate him desperately enough to hand him over to the authorities, either for monetary gain (as in the case of both Logre and Lebigre) or out of pure spite (as in the case of Mère Méhudin and the other letter writers).