Radio Free Europe/Radio Liberty has posted some decades-old posters of Nazi and Soviet Union propaganda posters that are staggeringly similar.
With their emphasis on totalitarianism, rigid ideology, and personality cults, it's safe to say that Nazi Germany and the Soviet Union had many common characteristics. Both regimes also had great faith in propaganda to promote their political ideas. This comparative collection of Nazi and Soviet posters compiled by the website gulag.ipvnews.org appears to indicate that the two authoritarian systems also had an uncannily similar aesthetic and approach to graphic design.And for a similar totalitarian, rigid ideology that happens to come in the form of a religion, you have this Palestinian adopting the same 'Sieg Heil' salute as above.
For the 6 other posters: RF/ERL