The Greeks (many others) didn't have "religion" but piety towards the family gods and fear (of spirits).
I'll give you this: The Persians in Herotodus hold a much more sensible answer to what started the enmity between the Hellenes and Persia than the Greeks did.
The Greek account invokes Zeus and gods and strange sexual escapades and bizarre happenstances...
The Persians blame the Palestinians (the more things change....
) and basically tell the Greeks: Hey, you're women are ho's, once a ho always a ho, forget them, get new women.
And the Greeks go berserk.
Which, makes more sense of their story in this fashion: Eros needs little rationality and causes a lot of damage.
Zoroastrianism, like the Persian account, is nice and sensible but a little overrated.