Makes me think of the curriculum discussed in Lies My Teacher Told Me. “Progressive” is not an apt description for this. It’s more in line with deep conservatism.
While these are more about slavery that white superemacism specificially, they give a pretty good view of what a number of American leaders respected enough to be elected to important positions in various states thought about the issue. The Confederate Cause in the Words of Its Leaders - The Atlantic
Brazil was definitely in the lead, along with what is now Venezuela and Colombia as well as the Spanish Caribbean.
You might be interested in Henry Louis Gate’s Black in Latin America series (documentary and website). The subject of race and racism in Brazil, especially as compared to the US, is fascinating.