NOT only in the US. In apartheid South Africa the famous children's book "Black Beauty" was banned. And in England the historic character that featured for decades on certain pots of jam, a "golliwog", was also banned. And the term "nigger" was originally not remotely racist, but acquired that connotation to the exclusion of its original meaning.
Yet the reality of racism continues unabated in many places. One wonderful reason for living in Belize.
Perhaps we have our priorities wrong?