Google any of these terms to see examples of people who were actually fined for speech in France, after 1950, and well after the 18th century:

- Hervé Eon Sarkozy fine

- Éric Zemmour 3000 fine

- bardot degenerates 20000

- Je me sens Charlie Coulibaly fine

None of these were threats or incitement to violence. Just insults.

And you talk about a constitutional right to free speech since the 18th century, but mocking Catholicism could be prosecuted until 1881 (i.e. in the 19th century).