As far as I know, there is no evidence of a specific "leftist" motive and no connection has been found to "leftist" organizations. Bear in mind that many Christians were opposed to Charlie Kirk's politics, and right-wingers didn't feel he went far enough. So that alone isn't evidence of "killing in the name of his leftism."
The memes aren't hard evidence either, since they're just memes.
I'd entertain steelman arguments for these theories using all available evidence but I've yet to see anyone do it.
At any rate, were a long way from "full stop" and you seem to be lashing out in the dark so I'm content to leave it here.
Hey look! More memes!
https://www.reuters.com/world/us/three-injured-shooting-ice-...
Also I thought you were leaving the thread. Here, let me show you how to actually do that.
See ya! Don't go posting any memes now!