How? X is hostile to any party attempting to bring justice to its users that are breaking the law. This is a last recourse, after X and its owner stated plainly that they don't see anything wrong with generating CSAM or pornographic images of non-consenting people, and that they won't do anything about it.
X will not provide these informations to the French Justice System. What then? Also insane that you believe the company that built a "commit crime" button bears no responsibility whatsoever in this debacle.