America said slavery was wrong. So was discrimination against blacks, Asians, and other groups, as well as what happened to the Native Americans. We taught this in our schools that what happened was wrong. When I was in West Germany, the Germans taught their people that what happened in WW II was wrong. When I was in Italy, the Italians admitted that Italian fascism was terrible for Italy and for Europe.
In contrast with the Chinese, if you read how the Chinese here spins what goes on in Tibet, you think that China is a saint. China is doing the Tibetans a favor by pulling them out of the dark ages, by force if necessary. Look at all the modern technology China is giving Tibet, etc. If the China-Tibet issue is put up to UNESCO, have no doubt China will howl to high heavens.
Official Records of Tibet from the Yuan Dynasty China, 1304-1367 | United Nations Educational, Scientific and Cultural Organization
Probably to show how China owns Tibet.