No Muslims are people who follow the religion of Islam and Persian is not an religion its a ethnic group.
The prophet named is Muhammad (peace be upon him) and he is an Arabic prophet and not Persian. Prophet Muhammad called his people to Islam.
The main religion in Persia (Iran) is Islam. It is a monotheistic religion. Many people use the term "Persian Religion" to refer to Zoroastrianism, which is the historic Persian religion. Zoroastrianism is a monolatrous form of henotheism. It does not fit into the binary of monotheism/polytheism.
The Persians had one official religion, Zoroastrianism, while the plytheistic Greeks worshipped many different gods in different ways
Persian Americans can have any religion. Typically, they are either Islamic because of their Persian background or they are Christian because of America but they can also be Atheists, Pagans, Hindus, Buddhists or any other religion.
Currently, most Persians (or Iranians) are Muslim.
zoroastian
Islam.
Zarathustra was a Persian prophet since his family originated from Persia. Although he ran away, his teachings were spread around the Persian Empire first. Persian nobles and Persian aristocrats embraced the new religion first and allowed the religion to blossom.
Religion had nothing to do with it. Religious wars arose many centures later between the followers of Yahweh/Jehovah/Allah who insisted that they alone were right, and fought to impose their views on others/each other. Before that, people generally recognised the gods of different peoples as being the same, but with a different local name eg Zeus = Jupiter.
A missionary.
Zoroaster