Don’t believe this is the work of The Left this time. More like followers of le Pen.
It’s not that easy. France’s cultural schizophrenia begets mobs. Most French people are nationalist at heart, but Leftist in practice. Many of the protesters are the right, but many are left.
The violent agitators are the usual suspects. Leftists will join any violent protest, claiming to be for the “common man,” and a smaller group of right wing zealots also welcome violence. The globalists support extremists on both sides—they win when nations fail.