That said, US on average seems to be doing a hell of a lot better in owning up to such injustices than many other place. For example, I was bored last night and reading about the Great Northern War between Sweden and Russia circa 1700s, and somehow managed to find out about TWO distinct ethnic groups and languages that barely exist today, but were more or less thriving as late as early 1900s in the area I would have considered nothing but Russian. If you are interested, read up on the history of Vyborg and Ingria: http://en.wikipedia.org/wiki/Ingria. Good luck getting the current residents to even knowledge this...
At least US is not in complete denial and that is quite laudable. Hopefully, more progress is made to that end.