The regime lost. They went into hiding or ran away. It's not necessary for every single person related to a group to be killed for it to lose.

The soviet union lost. Nazis lost. The Ottoman empire lost. England, Spain, Portugal didn't lose to an enemy but their empires died. One group is always thought as evil in western education, the other is not.

The united states need to be properly defeated for the next winners to see the American atrocities in a proper light.

But I would be already happy with just their empire fading away and only lies remaining in school books.