I think good ol' American entertainment had a massive role on account of its writers and wide disbursal around the world.

I am throwing these examples down, there are many others-

From Broadway: "Flower Drum Song" "Showboat"/ "West Side Story"/ "South Pacifac"/ "Lost In The Stars"

From Hollywood: "Guess Who's Coming To Dinner"/ "The Presdient's Analyst"

From the television show: "Bonanza" "Kung Fu" "I Spy" "Dick Van Dyke"

Racism was endemic on this continent for hundreds of years. The media allowed ideas in the form of stories to get out there, and in the case of the Civil Rights Movement, a light to shine.

But it is 'use' of the media rather than media itself. The Nazi state controlled all media and all media bent to the racist will of the state in order to justify, validate, and promote a racist government agenda.