What I'm thinking it is, is a two birds 1 bullet type situation. Fuentes is a mexican faggot that only has 1,000 viewers on a good day, but the Left doesn't realize that and thinks he is just as big as Charlie Kirk and thus believe their own propaganda because of how much exposure they give him.
So they all probably got together on their little talking points discords and decided that if they can flood the zone on X and Reddit and make it look like a Groyper shot Charlie, then Fuentes won't become the next Charlie and also keep the political heat off of themselves and trannies.