The word “Master Race” is clearly equivalent to terms which were used by Nazis and so are today’s far right wing and alt-rights.
There are other communities which created similar narratives, especially from the 4chan side, and I think the origin of “PC Master Race” comes from there.
Same shit. Different problem. Abolitionism is not finished yet, my friends. And seen in this way, progressive progress has not yet come to an end. It’s an ever evolving project.