Hundreds of left-wing celebrity figures, including actress Gabrielle Union and Comedy Central late-night host Trevor Noah, signed onto a statement from the Black Artists for Freedom — “a collective of black workers in the culture industries” — demanding the abolition of police and “the complete dismantling of the racist prison-industrial system” as a means to end America’s “racist culture.” “The fact is plain: Black people are still not free,” the statement, titled “Our Juneteenth” reads. “Day after day, generation upon generation, we are threatened, brutalized, and murdered by law enforcement and vigilantes. When we hear ‘I can’t breathe,’ we hear...