You said you haven't worked with majority white schools...I have. My kid went to a school that as 55/45 white to black. I did volunteer, tutor, was at PTAs, went to the school whenever I felt there was an issue...and you know what? They didn't want to see me coming.
I had the old white teacher tell my kid who killed 3 deer on opening day to stop lying. And then when he was selling for the BEta club, said, she didn't know they would let "some people" sell and she indicated she pointed at him. So, I had to see her. That was ugly and she had to apologize. I moved my kid.
I was called to a parent teacher conference by another white teacher who, once we were there, was unable to articulate what the issue was...she kept saying my son didn't treat her like she thought he should---she told me after I asked, no, he wasn't disrespectful, hadn't talked talked back, etc...she just thought he should treat her...better. Both me and the counselor gave her a WTF look.
Then his HS school counselor...I had to make a special trip to get him into the Honors English class. The counselor told me that I'd have to sign off because when he failed, it would be on me. I told him that 1) he'd always been in high level classes so what was different and 2) that was a piss poor attitude and perhaps he shouldn't be counseling students. He was retiring at the end of the school year anyway. My kid graduated with honors.
I'm there whenever I need to be and they were still trying to mess over him at every turn. So yes, there are plenty of teachers that don't give a damn OR see our children as viable. As my dude said, and there is some truth, teaching is no longer the honorable profession it historically was. Now, it's akin to working at the 7/11...folks using it as a fallback when they can't find work elsewhere...and that is terrible.
But what's wrong with black parents coming together to create new home schooling consortiums that teach their own history?