Why was an official policy of religious tolerance more crucial to the stability of thr Persian empire than it was to the Greek civilization?

An official policy of religious tolerance was crucial to the stability of the Persian Empire because it encompassed a vast and diverse array of cultures and religions, helping to integrate various groups and reduce the likelihood of rebellion. In contrast, Greek civilization was characterized by a more homogeneous culture and city-states that often shared similar beliefs, making strict religious adherence less critical for unity. The Persians recognized that acceptance of local customs and religions fostered loyalty among conquered peoples, whereas the Greek city-states often relied on shared cultural and civic identity for cohesion. Thus, religious tolerance was a strategic choice for Persia to maintain control over its expansive territory.