i'm not disputing that it does but i'm less clear on how white supremacy harms crackers other than the line about racism being a wedge to control poor whites.
That's the issue. All of sociology must be rooted in historical materialism. Doing that here, we can see the issue is to split the working class so that working whites do the job of the bourgeoisie for them-- they do not grasp class consciousness, opting instead to self-identify as an invented social concept ("white") -- a concept that is always defined as acceptable and aligned with the ruling class' material goals -- in order to split the working class and oppress other races, sexes, genders, etc avoiding revolution.
That's the issue. All of sociology must be rooted in historical materialism. Doing that here, we can see the issue is to split the working class so that working whites do the job of the bourgeoisie for them-- they do not grasp class consciousness, opting instead to self-identify as an invented social concept ("white") -- a concept that is always defined as acceptable and aligned with the ruling class' material goals -- in order to split the working class and oppress other races, sexes, genders, etc avoiding revolution.
I found this write up in People's World helpful here