The Looney Tunes Golden Collection DVDs have a disclaimer explaining there are racial stereotypes in some of the cartoons!

There are some Looney Tunes and Merrie Melodies shorts that are no longer available to the American public. This is because of the racial stereotypes of black people, Jews, Asians, Native Americans, Chinese, and Germans portrayed in the cartoons. The Censored Eleven are eleven cartoons that were strongly stereotypical of black characters and a few Japanese people. They were withdrawn from circulation in 1968. 

In 1999, Speedy Gonzalez was shortly banned for being too stereotypical of Mexicans. The Hispanic population complained and said they felt positively about Speedy Gonzalez and he brought fond memories, so his shorts were available once again in 2002. Goldwyn cartoons often contained extra footage and gag reels with then-common racial and ethnic stereotypes. 

The Looney Tunes Golden Collection: Volume 3 includes a disclaimer at the beginning of each DVD given by Whoopi Goldberg. She explains that the cartoons are a product of their time and were wrong then and wrong now in their stereotypes, but they weren’t edited, because that would deny that those stereotypes existed. 

(Source)