Context: Luigi Galleani was an Italian Anarchist, who advocated for 'Propaganda of the Deed' - radical, direct action (political assassinations, bombings, etc).
He was arrested and exiled numerous times for his insurrectionist and anti-war views. Eventually growing disillusioned with labour movements and unionism for their reformist approaches. His followers were known as Galleanisti and were responsible for acts such as poisoning hundreds of high profile industrial/finance/law figures at a banquet a la the Red Wedding, attempting to bomb John D. Rockefeller, fighting in the Mexican revolution, bombing Wall Street, among other notable acts of resistance.
Not sure about Abe, but Kirk was just yet another inevitable example of right-on-right violence and thus doesn't count.
I mean just because the shooter wasn't a leftist doesn't mean it wasn't propaganda of the deed, right? Like clearly, Kirk was targeted (rightly
) because of what he said (otherwise, why not shoot anyone else at the event?), I guess from a right-wing perspective.