If Barack Obama was 100% pure Mandinka Warrior and not of mixed race he could have never been elected President of the United States. The other side of that coin is that there is no greater fear woven into the fabric of American society, culture and history of racism than the possibilities of a successful mixed-race Barack Obama.
Acts of violence and oppression post slavery are directly related to an innate fear by Whites of mixing the races that produced Obama's existence and success. Every lynching and killings of Black people is about the fear of blending the invention of the White race with the Black race.
Ta-Nehisi Coates is correct when he writes that people choose to believe themselves to be of a particular superior race. The White race was invented with the use of gun powder and violence. The White race invented the Black race with gun powder to give themselves privileges of an invented superior race.
I understand that last statement sounds a little contradictory but I believe race had to be invented so that racism could be used as a tool of oppression. All manner of racism's and other divisive human-ism's serve the evil cause of material possession and theft of the things, personhood and realities of other human beings.
Racism did not existed in human history, but was invented. Racism is a convenient invention of a devils mind to justify tyranny, oppression, slavery and genocide so that good people were willing and ignorantly participants in civilization's worst offences against their human brothers and sisters.