I don't know about this concrete case (and my french is not good enough to find out with ease) - but the context is likely, that they joined the YPG at some point.
It was/is a weird situation. They are very anticapitalist and marxist with some anarchist elements, but they got western support when they were fighting ISIS (and to some extent Assad/Putin) in Syria.
So in Syria communist rebells got US weapons and I believe US troops are still on the ground helping them. But back home in the west, those activists get prosecuted, because the PKK (the mother organisation of YPG) is considered a terrorist organisation (and likely they still are doing terrorism, even though it is of course a "separate" organisation https://en.wikipedia.org/wiki/Kurdistan_Freedom_Hawks)
https://en.wikipedia.org/wiki/People%27s_Defense_Units
It was/is a weird situation. They are very anticapitalist and marxist with some anarchist elements, but they got western support when they were fighting ISIS (and to some extent Assad/Putin) in Syria.
So in Syria communist rebells got US weapons and I believe US troops are still on the ground helping them. But back home in the west, those activists get prosecuted, because the PKK (the mother organisation of YPG) is considered a terrorist organisation (and likely they still are doing terrorism, even though it is of course a "separate" organisation https://en.wikipedia.org/wiki/Kurdistan_Freedom_Hawks)