Well, first off, you must be young. and you must also not know how racism works. Black people can be prejudiced, can be discriminatory, and can be suspect in their ideas towards white people. However, black people in the US have NEVER held power over white people. Black people have NEVER decided where white people could live, called "redlining". Black people have never looked at white applicants for jobs and told them "no" based on the color of their skin. Black people have NEVER told a white person they could not get a loan from the bank for the color of their skin, nor charged a higher interest fee on their loan, and charged a lower fee to their black counterparts. And as for the "house" negroes and field "negroes, these caste systems still exist. White supremacy still dictates those tropes, but now it is spread out over the different races, and we all fall into a different category. What you will find is that over time, the "oppressed" becomes the "oppressors" and THAT is what makes us all Americans.