At first it was a niche reference to a niche b-horror movie that soon became a niche insult then that niche insult became applied mostly to the right and someone had the bright idea of making a wojak meme out of a racist mass shooter and it became associated with chud itself and that stopped chud being a wing meme after that, it’s similar to what happened to woke. Nowadays whenever I hear the word chud I wince a little, especially when it’s coming from a fellow leftist. Similar thing happened the stonetoss edits, leftists kept editing those comics which usually had racist/transphobic/offensive jokes to like not be offensive and that became a meme to the point that the right wing is now editing the stonetoss comics to be ironically “woke” and the left by engaging with the right wing meme sphere have inadvertently created a reactionary force against themselves. TLDR the left shot itself in the foot by making the chud meme.