Awty, thanks.
That's an incredibly good depiction of something crucial for understanding blues and, as well, what a few white kids experienced in and around Oakland ... which was importantly connected to events in Berkeley, especially including opposition to the war in Vietnam
I attended San Leandro High School, a nearly entirely white school immediately adjoining Oakland.
I attended Oakland City College for a year, during which I saw the Black Panthers being formed. OCC was said to be 60% Black. The energy level was very high and the faculty was wonderful.
The Black Panthers were the sons and daughters of the people in that Oakland Blues film. They saw their parents, heroes of WWII and Korea, abused by the city's imported, non resident police. They understood that it was up to their generation to demand and get respect.