Zemmour is right, and what's more, him calling out that process has awakened a whole bunch of people (including myself) from the propaganda we have been subject to for decades in France. Giving the monster a name, and identifying his methods makes it so much easier to resist and fight back its attempts at dissolving our culture into the joyful globalism they so desperately want the french people to embrace.
In a couple years, the most eminent historians will tell you that there never was French people in France. In fact, there never was such a thing as France. The hexagon is just a geographical area in which different individual co-exist peacefully, and nothing more, not a culture, not a civilization, not a language. This sort of historical revisionism and the obvious agenda it serves will only further feed the identitarian right's narrative.
Deconstructionism has been deconstructed by Zemmour, Michéa and others. The pendulum has started swinging back, in the coming decades you will only see it accelerate.