There was no nation called Greece in 480 BC, there were only loosly affiliated city-states all of which in another fifty years would be at each other's throats.
And there were no Muslims involved. The Persians were Zoroastrians.
Of course .. but after the Persians attacked Athens .. it galvanized the "loosely affiliated city-states" into a force which destroyed the Persians.
And .. I still say .. if the Persians had not been destroyed .. Greece would not have emerged as a nation and the Muslims would have had an open door when the remaining Greek army was destroyed.
Geeeeeeze .. you people are so sanctimonious .. you can't see beyond the end of your nose.