Good observation. To discover the pecking order in a society, ask who it is you can and can't criticize. [And there's always a pecking order, that's an enduring part of human life, even in America.]
The people that founded and built this country--the ones that had the largest hand in it, at least, are now fair game. The white working and middle classes are the most besieged demographic in America. Anybody can dump on them, and even demand reparations for "crimes" both real and imagined. But if anybody raises a peep about that, the heat comes on. People have even lost jobs in witchhunts for "racists."