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.
It’s “tongue in cheek”. What you’re implying, is all of the comedy and parodies of nazis, or the KKK throughout history is actually supporting them? No, it’s making them smaller, and smaller, and completely laughable.
Perhaps we should rename it to Linux-Care-Bears. You can be Overly-Sensitive-Bear, or Whoosh-Bear.