I thought “Blue MAGA” was a fictitious organization used only by authoritarians cosplaying as lefties. MAGAs wouldn’t use it because the implication is that “Red” MAGAs are also brainwashed clowns in a cult (which is true, but they don’t like that fact).
When MAGAs are pretending that the terrorism their team commits is someone else’s fault I think they blame antifas or the FBI.