The SLA only had one black member, who at the time was an escaped convict. Why would a half-dozen white hippies, and one black fugitive, leave their safehouse to hold a strategy meeting in East Oakland?
And also that radical hippies tend not to have a lot of money, so it's not unusual for them to live in low income neighborhoods (i.e. some members likely lived there anyways).
TL;DR none of what you said remotely applies. They were middle-upper-class with access to resources and lived in Berkeley before moving to a notorious Concord safehouse in August ‘73, about 3 months before anything in this story takes place.
The only thing? That murder was a huge deal, and what got the FBI involved. We're talking about the assassination of Oakland's first black school superintendent. By self described marxist/lenninist/maoist terrorists and using cyanide laced bullets. The headlines write themselves.
Now is there not only a fugitive in the group, but they're all fresh off making national news for political violence? Violence that wildly alienated the black community? At which point they choose to leave their actual safehouse to go to a "we think its safe" house in said community for a brief meeting? Did they forget their fake IDs? OPD is looking for (literal) leftist terrorists and don't find a single excuse to detain 6 hippies and a black man?
I don't doubt you're sharing this in good faith, but If I'm gonna keep it a buck, none of this passes the smell test for me. That said, I guess it would track in a way. The whole SLA affair has a stranger than fiction vibe to it from start to finish.