A number of far-right terrorists have espoused the conspiracy theory. Other than Anders Behring Breivik, Jack Renshaw, a neo-Nazi child sex offender convicted of plotting the assassination of Labour MP Rosie Cooper, promoted the conspiracy theory in a video for the British National Party. John T. Earnest, the perpetrator of the 2019 Poway synagogue shooting, was inspired by white nationalist ideology. In an online manifesto, Earnst stated that he believed "every Jew is responsible for the meticulously planned genocide of the European race" through the promotion of "cultural Marxism and communism."