I am glad you brought up this subject. I cringe each time I hear the words, "we aren't the white race or Black race. We are the human race." That statement not only flies in the face of the "social construction" thesis but it plays indirectly into Darwin's theory of the evolution of man, where humans began in Africa but ascended into Europe with the level of humanity that made one group of humans superior to all others, irrespective of race.
The notion that "We are all brothers and sisters" is unrealistic and rooted in the liberal attempt at color blindness after the Civil Rights Act was enacted, and deals solely with interpersonal relationships rather than institutional policies, laws, and regulations that are systemically and structurally racist.
No amount of brown vs. blue will eliminate the generational ideology of white supremacy. At best, it enables white people to realize how they behave unconsciously. Will it erase the belief that they are sovereign? After all these years, It hasn't yet.