I don't think it amounted to nothing. I think the before and after of this event has completely and totally changed conversations I have. Previously if I so much as veered towards the very idea of harming property, let alone doing violence, I would have been met with intense pushback from "civility" liberals. Now though? It has become fringe to be against violence if ghouls clearly deserve it.
Has it achieved policy change? No. But has it affected the proletariat? 100% yes it has, it broke the obsession with non-violence and high-ground in the massive majority of people. I see that as a prerequisite to revolution. You can not perform violence without people supporting violence and catalyst events need to occur that push people onto that.
Similarly however, catalyst events can push people in the opposite direction too.