I hope you get another comment from someone who knows way more than I have picked up, but from what I can tell he apparently wore a Pepe costume and Nick Fuentes apparently was suggesting Kirk was a fascist. I'm not sure what Nick's actual politics are other than despicable, but apparently he didn't like how Kirk was doing fascism so I guess you can think Kirk is a fascist and support Fuentes. People are taking that and the furry aspect of the alleged engravings because apparently Fuentes fans lean into being furries. So overall it seems like a Pepe costume, furry reference, and fascist critiques are being interpreted by some to suggest groyper. Admittedly, I am not thoroughly convinced, but "If you're reading this you're gay LMAO" is some generic 4chan trash that I can't imagine any actual anti fascists would want to be tied to. Stranger things have happened though.