Ah, I understand now. That is empirically true-that the white working class has been declared the bigoted oppressors.
It is also true that Leftism is cannibalistic in nature, and your comment points out that reality.
It is also true that the Left constantly has to have people to pit against each other, and that eventually they run out of those, and end up eating themselves to continue.
While Bernie Sanders and other octo and nonogenerian lefties still rail against "the billionaires", that's not really what animates most of the progressive left today. Racial, ethnic, and sexual grievances are much more central to their worldview. Same form, different content.