> Most applications of political correctness focus (at least on the surface) on defending a marginalized group against the verbal attacks of a privileged one.

I dispute the idea that PC is mostly defensive in nature; rather it seems to be overwhelmingly offensive, targeting people who frequently aren’t even in advantaged groups themselves. I would also suggest that Jews are treated pretty badly by the PC folks, as are Asians (although #StopAsianHate in the wake of what appears to be a non-hate-crime has been a convenient bludgeon).