They actually claim that this is needed because ‘most Americans prefer lighter skin”, and skip that laws already cover civil rights infractions against people.
Via Huff Po:
With the dash-cam video of Sandra Bland being forcibly removed out of her car, simply because she refused to put out a cigarette, some context is needed in regards to similar tragedies spanning from Rodney King and Trayvon Martin to Eric Garner and John Crawford. While police brutality affects people of all races and backgrounds in the U.S., it’s important to note that black citizens face a unique experience within America’s criminal justice system, just as they’ve faced a unique state of affairs for centuries in the United States.
As Harvard professor Jennfer L. Hochschild points out in The Skin Color Paradox and The American Racial Order, “racial minorities with dark skin in the United States have been disproportionately disadvantaged for centuries” and “with some exceptions, most Americans prefer lighter to darker skin aesthetically, normatively, and culturally.”