Blondie mentioned the Japanese-Americans. What about the Native Americans or the American Indians, if you prefer? There's a group that was treated pretty bad. Took their land, their culture, tried to force white man ways and religion on them, and when that didn't work, tried to exterminate them.
Of all the things done in the name of progress, God, and America in this county, if we started paying reparations for everyone wronged, well... there is no way to do it. Learn from the past, apologize when necessary, fix what you can as it happens, change wrong practices, change attitudes, and move forward while not forgetting that our past has not always been glorious.