There is a little bit of truth to this but some nonsense too. The Spartans were certainly not Africans. My classics professor said that although most of them were probably black headed, they were Doric Greeks and were often thought of as tall and blond as opposed to the Ionians who were shorter and had a Mediterranean complexion.
"In 498 BCE, Athens carried out a terrorist attack on Sardis, a major Persian city, which made 9/11 seem like child's play. Aristagoras, an Athenian, set fire to the "outlying parts" of Sardis trapping most of its population "in a ring of fire."
Sardis was an the Athenian acropolis, one of the many ancient Greek colonies founded in Anatolia/Asia Minor(Modern Turkey) that came under Persian control when the Persian Empire expanded its power. So in general that wasn't a "Persian" city that was burned to the ground, more like a "Greek occupied city".