"White Supremacy" is the rhetoric that allows mediocre white people to feel superior and claim participation in a system they had nothing to do with and contribute nothing to.
That's the reason its allowed to be debated on tv and universities ad nauseum.
It placates wack white people, they know their lives sucks but it would be worse if I were black they think.
And it installs an inferiority complex in black people. You're basically conceding the superiority of another race over you.
The truth is that most of the problems we attribute to "white supremacy" stem from the breakdown of the black family structure and all the associated morals, ethics, monetary, and collective bargaining power that comes from strong families over decades and centuries.
1 trip through a trailer park in the south or a drive through rural Appalachia should immediately dead any notion of a collective "white supremacy"
You have a group of white people with similar values whose families have been mixing and interbreeding for centuries. And because most people don't move too far from where they were born that network has become fortified in the areas where they are dominant.
Then you have black people, who have been refusing to create functional families for almost 100 years. Instead appealing to the dominant society for acceptance.
You should've known white supremacy was cap when Asians beat white people at their own game by maintaining a rigid familiar culture. Then instead of acknowledging what they did they tried to classify Asians as white lol.
TL/DR: White Supremacy as it is currently used is propaganda to subconciously create a superiority complex in white people and an inferiority complex in black people