I can't say I know much about Zoroasterianism except they believed in one God and were tolerant. I did read that the 3 wise men who brought gifts to Jesus were Zoroasterians --- is that true? It seems that the religion might have been pretty much destroyed by Islam but may have left some influences on the Persians and Turks which is why they seem a little more open and tolerant as a whole than Saudis and the Arabs.