Why don't they teach these things in school?

Well it is actually, look on YouTube for the effects of Persian kings on Founding Fathers and the laws of the US

I said particularly. There's only so much room in a curriculum. It doesn't seem unreasonable that something as small as this wouldn't make it in.

Well he's the one freeing Jews to go to Jerusalem and start their civilization, later on apparently crucifying Jesus. No one could crucify Cyrus the Great