The State engaged in plenty of mass indiscriminate violence against nonviolent people in the same period. The incidents you mention killed two people (one of whom, as a historical irony, was a working class security officer, and the other was an anarchist himself.)
But when the government comes in and kills dozens if not hundreds of people in various labor incidents (or turned a blind eye to corporations doing the same), it's just establishing "law and order" (read: used violent force to ensure the continued functioning of and economic profits of capital).
There's also the elephant in the room, since we're talking about the 1910s, of some unspecified but very widespread government violence and big explosions in public squares. Though that was more a competition among elites, it was still borne disproportionately by the non-elite.