The political activist organization Black Lives Matter blasted American police and politicians who support them Wednesday. “Maintaining a white supremacist institution like policing costs Black lives,” the organization wrote . “This continued commitment by politicians to support our killers makes them accessories to our demise.” The organization’s comments come after a gunman opened fire on a Uvalde, Texas Elementary school, killing at least 21. Two officers were shot responding to the scene. Maintaining a white supremacist institution like policing costs Black lives. This continued commitment by politicians to support our killers makes them accessories to our demise. — Black Lives...