I've definitely seen some people say that nick fuentes called charlie kirk a fascist. I'm not going to sort through hours of footage on this though. Like most the alt right calls leftists fascist, this can be seen everywhere from alex jones to like all the right wing youtubers. Groypers see kirk as a leftist.

And "groyper war" (the groyper website dedicated to harassing charlie kirk) definitely had bella ciao memes.

Like I think with this shooter the memes all being from that site would be a hell if a coincidence if they're not related.