Actually, Is. 21:2 KJV says, A grievous vision is declared unto me; the treacherous dealer dealeth treacherously, and the spoiler spoileth. Go up, O Elam: besiege, O Media; all the sighing thereof have I made to cease. Your statement in quotemarks is wholly imaginative.

Verse 9 declares the upshot: And, behold, here cometh a chariot of men, with a couple of horsemen. And he answered and said, Babylon is fallen, is fallen; and all the graven images of her gods he hath broken unto the ground.

Elam and Media were the domains of Cyrus, who successfully attacked Babylon (ruled by Nabonidus) via his general Gubaru ("Darius the Mede") on 12 Oct 539 BC. Cyrus also ruled the Achaemenid Empire (geography later Persia, later Iran), but Isaiah isn't focused on that empire. If we were to twist the Scriptures so far as to turn Media into Persia (with which it is always contrasted even as they were allies), and to turn Babylon into Israel (its physical and spiritual enemy), we could imagine anything to be true.

For a real prophecy about Persia attacking Israel in the latter days, consider Ezek. 38:5 and context. For real prophetic details about Persia's former control of Israel, consider Dan. 8:20 and context.