When people have an ideology that has some kind of immorality as one of its fundamentals (like most far-edges political ideologies do), and they attempt to manifest that ideology, calling it "cosplay" can either be a derogatory term (implying "they failed"), or it can be a defensive term (implying "they're just trolling, they don't really feel that way") to draw attention away from the immorality. That ambiguity has made the term less useful.