Edit: "populations" -> "groups of people"
If these people were really "just bad apples", this wouldn't be a problem anymore, as there have been literal decades to solve this.
See how that's different from a group defined by things you cannot control, like skin color?
I can't blame one person of a certain hue for the actions of a person of that same hue, because they don't share anything in common other than the hue.
Whereas police departments are 100% accountable for the actions of their members.
Today you learned, huh?