Answer:
In the Persian Empire, since the period of Achaemenid dynasty there was an existing principle of religious tolerance, that was spread throughout the whole country.
Step-by-step explanation:
Even during the reign of Cyrus the Great, who was the first important ruler of the Empire a religious tolerance was established. He was known in history as a ruler who freed Jews from Babylonian captivity, but also as someone who brought edict throughout the country in which a principle of tolerance dominated. This was continued during the period of his successors.