Memes

The US is clearly not facing their slavery past and instead avoiding the difficult and deeply disturbing vocabulary associated with it.

Certain individuals and organizations are doing this, sure, but then you have the monumental amount of academic research in the humanities into slavery, you have publicly and privately owned historical sites and museums that explicitly teach about the history of slavery in the United States, and you have a non-trivial amount of media depicting the horrors of slavery. It's not a monolithic cultural rejection in the same way that a nation like Japan has attempted to totally erase any record of its wrongdoings in the first half of the twentieth century.