We already have those. They’re called Antifa.
In Nicaraugua, they’re called Turbas Divinas
Just Communist street gangs: Bolsheviks started it, Bela Kun in Hungary, Rote Front gangs in Germany in the ‘20s.
Standard crap for them. Part of their playbook.
I bet they will reemerge stronger than ever before long, probably with Ukraine black market weapons, too.