The Greeks didn't care what other countries thought about their religion and they felt calm and completely normal with it
what religions did the Greeks have
Polytheism; nature religions--
No, but then all the major religions make the same claim for their god(s). The difference in other religions is that the Greeks had many gods, most modern religions have only one.
Relieved.
They found it extremely important.
The Greeks started with pagan made up religions, then switched to philosophy because they admired intelligence. Then when Christianity came around, many of the Greeks converted to Christianity because it was a match of truth, faith, and education.
Because their religion had many gods. It is called polytheism. There are many such religions.
The Romans respected other religions.
The Greeks prevailing over Persian expansionism gave to the Greeks confidence in their military arms to defeat Persian armies/navies .
If you mean Islam, they feel they are infidels.
Greeks very much liked art. When it came to doing it, most of it would be painting their gods and goddesses.
The Romans tolerated other religions as long as they were not what the Romans considered decadent or treasonous.