Time Loop

As a student of history, I see many events of our ancient past repeating themselves. The ancient Persian Empire introduced freedom of religion, diversity of culture, and honored the Jewish people. I see history repeat itself with the United States as a modern Persian Empire that introduced freedom of religion and diversity of cultures to the world. Persia was one of the first empires that did not ransack and strip a nation of all its resources when they conquered it. Just as the United States did not ransack the nations it conquered but emptied its own treasuries to restore the conquered nation. The parallels between the Persian Empire and the United States are uncanny, to the point of aiding the Jews in their return to their homeland.
Suppose this theory of history repeating itself is true. In that case, just as the Persian Empire did, there will come a time when internal conflict, a decline in world power and influence will come, causing the United States to back away from Israel. There will arise leaders who oppose Israel just as there arose kings in Persia who would eventually oppose Israel. By that time, Persia was no longer a world power. Is that the fate of the United States? Do we see history repeating itself right now. Even in the coming year?