In the 1920s, a now almost forgotten sect flourished in the USA and parts of Europe. It was called the Mazdaznan society, and was founded by a person calling himself "Doctor Otman Zar-Adusht Ha'nish". This man claimed that he was born in 1844, the son of a Russian diplomat in Teheran and his German wife. As a child he was of weak health, which caused the parents to send him to a Zoroastrian order in the Ghin-Ghan mountains in Tibet, where he was raised and accepted into the order. After 25 years he was appointed to preach the teachings of the order for the good of mankind, and travelled through many countries before finally settling down in Chicago.
In reality, his name was Otto Hanisch, born 1854 in Leipzig (or possibly in Poland) from where he emigrated to the USA. There he founded the Mazdaznan cult and acted as its leader until his death in 1936. Most of his sect members were Germans. Hanisch claimed to be transmitting the ancient Zoroastrian religion, but his teachings actually have very little to do with the historic Zarathustra. Rather, Hanisch's teachings are concerned with vegetarianism, breathing exercises and the superiority of the Aryan race (though unlike Hitler, Hanisch was not an antisemite and counted the Jews as Aryans).
His book about Jesus, "Jehoshua the Nazir", is not a Biblical hoax pretending to be an ancient gospel manuscript. He claims to have retrieved his information from various mysterious Eastern sources, and there are plenty of statements which suggest a familiarity with the "Essene epistle". The book is full of historical absurdities, e.g. "neo-platonics" are said to have supported the Essenes (neo-platonism was a philosophical movement founded around 200 AD in Alexandria). Zarathustra's followers are called "ghebres", a name that was applied to them in Iran after the country had become islamic in the 7th century. Hanisch's autobiographical story is equally erroneous, e.g. Zoroastrism never existed in Tibet.
Enough said.