Assuming we're sticking with the race framing:

Imagine if BLM leaders focused on statistics on whites unjustly killed by cops. Imagine if they posted all the videos of unjust killing of whites by cops.

The data supports that police brutality is a big problem for everybody. But right now, BLM has it as only a problem for black people. If they reframed it as a problem of police brutality against others as well, the support for reforming police would become overwhelming.