For fifty years, the events of May–June 1968 in France have had a collective hero: the striking students and workers who occupied their factories and universities and high schools. They’ve also had a collective villain, one within the same camp: the French Communist Party (PCF) and its allied labor union organization, the Confédération Générale du Travail (CGT), which together did all they could to put a brake on a potential revolution, blocking the students and workers from uniting or even fraternizing. [...]
There is an element of truth in this characterization of the Communists, though only an element: the party line modified with events, and the general strike and factory occupations would not have been possible without Communist participation. [...] For the students and their allies, who wholeheartedly rejected the PCF, it was the Communists who kept the workers from joining their cause. [...] But in this, the Communists did indeed have the support of the mass of the workers, few of whom marched behind the black flag. A constellation of far-left groups—anarchist, Trotskyist, and Maoist—flourished in France in the 1960s, all claiming to represent the interests of the working class. In reality, it was the Communist Party, and not the smaller left-wing groups or the Socialist Party, that had the strongest working-class presence in 1968. [...]
The Communists may have been poor revolutionaries, but they were politically astute. They knew the workers, knew what they would fight for, and got them what they wanted. [...]
https://www.nybooks.com/daily/2018/04/19/1968-when-the-communist-party-stopped-a-french-revolution/
there doesn't seem to be anything here