Activism doesn't just have to do with police brutality, it's about unequal policing/enforcement. It's about a lack of trust flowing in each direction between two groups. Killings, especially racially motivated killings, just make headlines. There's no PR firm that's going to heal generations of mistrust. But there are good examples in places like Dallas of community building, training, and adding resources that are worth emulating.
Keep in mind that I scored a 31 on the PBS quiz, but for me I would like to see actual legal accountability for police officers who act outside their given authority. It's not so much a race issue for me, as it is a complete frustration when police get off scot free time and time again. This applies to killing of unarmed black citizens, corrupt civil seizures, etc...