For them, street violence is not wrong per se, as long as it’s carried out by the right sort of perpetrators against the right sort victims. In that case, it’s something to be celebrated. In other words, it’s not Fascism when they do it.
The same leftists who cry that National Socialism (NAZIsm) wasn’t Socialist will tell you that the USSR, Cuba, Vietnam, North Korea, China, et al aren’t REAL Communism (but they love Stalin, Mao, Castro, Che, Ho Chi Min, Pol Pot, Jim Jones, etc. all the same).
They will also tell you that police are Fascists, Bush, Reagan, and Nixon are Fascist, etc.
Their cries are BullStalin.