Well, I can agree the 70's were an opportunity, unfortunately it came on the heals of the Civil Rights movement and the pushback on that was broad and equally uneven (i.e. The South, in one sense). Incorporating more African-Americans into the labor force in the 70's was going against a tide. 'Fuck what the feds say' was the common sentiment in more places than is comfortable to admit. Best thing to happen to Black Folks in the 1970s was Sesame Street and Fred Rogers imo. Then came Regan in the 70's who couldn't wait to tell white folks how to feel about Black folks again, i.e. when Roots came out.
Tuh. Charlton Heston was a 'white liberal' in the 60's until he came into his real truth by the end of the 70's. I feel 'white libs' was like- 'that's my shift getting Civil Rights passed, time to clock back out!'"Very frankly, I thought the bias of all the good people being one color and all the bad people being another was rather destructive." He added that he was impressed by the huge audience the series attained, but "I didn't know there was anyone who could stay home eight nights in a row."
And Black people don't and can't HATE White poeple in the same analogous terms it works in the other direction. There iss no precident for say, brutalities sake, for one. No systematic hierarchy in place to act on such a thing. It's self defeating for us. Thing is, It's taken Black people a lot of time developing a keen discernment in engaging our majority counterparts and peers. I feel so many things are glossed over or fall short due to this lack of acknowledgement.
FWiw, certain American milestones have a deeper meaning to US than the effect on the larger populace. That's why we joke about "The Kenyan" who dared from time to time.