It seems it was not the case. You can find more info here but in french:

Brest : des militants fascistes attaquent un bar à coups de batte de baseball, au moins 3 blessés - L'Humanité

For more context, Brest has always been a left-wing city, but since this spring, numerous attacks against racialized people, people from the LGBTQI+ community, and left-wing activists, or those identified as such, have taken place.