As an adult, I have yet to meet a black person that wasn’t a racist. I work in a professional environment, yet, every black person I have known eventually came out as a racist, from a VP of Engineering that would never invite a white person to his Super Bowl parties to the fellow engineer that was hoping Obama would lead a “bloody revolution”. I thought I had friends with several blacks, only to find that wasn’t the case.
I had black friends as a child, but not a single one as an adult.
I'm sad to hear of your experiences. I can only surmise that you haven't known all that many black people in your adult life, and of those you have known, most were the ignorant sort.
There's good and bad in every sub-group of humanity. Most cannot be pigeon-holed into any one stereotype. You may never meet them, but there are millions of blacks in this country who don't hate you because of your race.