The Panthers did free before school breakfast and after school babysitting and all sorts of actual community building like that. The PSL does protests and craft events and that's it. I guess providing consistent services is an order of magnitude more difficult than organizing marches but it just doesn't seem like the marches are getting us anywhere.
The usa spent most of the last fifty years strengthening and expanding the police state and the prison system in part to crush anyone who strays out of the civility stage.