>it's a concept (dog whistle) that is used strictly for generating rage and calling other individuals to arms so that the crowd picks up torches and pitchforks and follows your lede in attacking an individual's opinion with as little prompting or individual thought as possible.

It is not used strictly for that, indeed would be ineffective for that purpose were it not also a useful word. It means "warning, this seemingly innocent reference/argument/line of argument has historically been used by people with questionable motives, and warrants extra scrutiny".