To enter why the Iranian towards Islamicism

Research on how and why the arrival of Muslims in Iran and the rapid spread of Islam in this country in the early centuries AD,Iranian political and religious situation awareness is on the verge of entering Muslims, sentiments and beliefs of the Muslim army against the Persian army and, more importantly,The charm and appeal of Islam to the false religion of Zoroastrianism, we understand the causes of apostasy old (Zoroastrian) and convert to Islam The Iranians leads. In this paper, theoretical and analytical approach to investigate the cause of Islam in Iran has been developed.

Keywords: Islam, Iran, Zoroastrian, Sassanian.