I’m not sure I even know of someone on the “left” that says things like he was saying.

Sort of the heart of the respective ideologies. Leftists are inclined towards egalitarianism and comradre, with the view that a handful of selfish people are hording wealth to the immiseration of all. Reactionaries are inclined towards eugenics and the theory that a favored few deserve it all, with the view that "culling the herd" of undesirables is important and necessary work for a society to perform.

You'd like to think that a leftist would have been the one to end Kirk's career abruptly. But the idea of a militant left is so tied up with the idea of Evil Foreigner "Tankies" (and to a lesser degree, the clumsy disastrous youth movements of the 90s/00s) that its totally alien to anyone in any active organizing roll.

Meanwhile, armed reactionaries looking for someone to assassinate are a dime a dozen.