I would love to think like you, but one of the legacies of Martinez(and now Binet) is that CGT is now so openly political in terms of higher ups that such things can be outsourced to some left wing militias.

Not suggesting Figaro is unbiased, but they are already reporting possible left wing involvement:

https://www.lefigaro.fr/faits-divers/sabotage-sur-le-reseau-...