Maybe they should. Retail workers are the real thing line between modern society and utter chaos. (If you don't agree, think about what happens if they run short of toilet paper, or the hell that is black Friday.)
The trouble is the people the police murder, kidnap, rape, and extort aren't their customers. They are the people their customers want to control.
Especially post George Floyd they don't really mess with criminals, they just hassle regular people since a single one was held accountable for murder.