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.
This reeks of thought policing. If language doesn’t contain the “bad words” you can’t think about it. I for one will not support a society that strives to become doubleplus good.
Language is more than just what Orwell thought it is.
Language can be harmful to others and recreate structures, which harm others.
I wish you wouldn’t use the word “harm”. I find that term hateful and hurtful.