PoliticalStreetFighters

When faith in "democracy" / the mechanisms of election etc. break down, then street protests starts to look more effective.

From there you might get explicit "street fighters", ie. gangs deliberately willing to cause violence on the streets to assert their existence and signal their power.

This is an old tactic was prominent with the rise of fascism (OnFascism)

(Though I guess others would argue that it goes back to barricades in the streets by LeftWing revolutionaries in, say, 19th century Paris)

The rise of FarRight street fighting groups though is definitely a symptom of a general rise of the right and collapse in faith that the electoral / democratic system gives people a voice.