"Accusation in a mirror is a false claim that accuses the target of something that the perpetrator is doing or intends to do.[3][4] The name was used by an anonymous Rwandan propagandist in Note Relative à la Propagande d'Expansion et de Recrutement. Drawing on the ideas of Joseph Goebbels, he instructed colleagues to "impute to enemies exactly what they and their own party are planning to do".[4][8][9] By invoking collective self-defense, propaganda is used to justify genocide, just as self-defense is a defense for individual homicide.[4] Susan Benesch remarked that while dehumanization "makes genocide seem acceptable", accusation in a mirror makes it seem necessary.[5]"
https://en.wikipedia.org/wiki/Accusation_in_a_mirror
"Accusation in a mirror is a false claim that accuses the target of something that the perpetrator is doing or intends to do.[3][4] The name was used by an anonymous Rwandan propagandist in Note Relative à la Propagande d'Expansion et de Recrutement. Drawing on the ideas of Joseph Goebbels, he instructed colleagues to "impute to enemies exactly what they and their own party are planning to do".[4][8][9] By invoking collective self-defense, propaganda is used to justify genocide, just as self-defense is a defense for individual homicide.[4] Susan Benesch remarked that while dehumanization "makes genocide seem acceptable", accusation in a mirror makes it seem necessary.[5]"