They don't ever show The Little Rascals on TV because of stuff like this, even though it was the first mainstream theatrical shorts series to show black and white kids playing together and treating each other as equals (a lot of times even living together). Same thing for Amos 'n' Andy radio shows (although that's way more understandable because the dudes doing the voicework were white, and sometimes performed in blackface in films and such). But there were black doctors, lawyers, businessmen, etc. in the show, and all of those characters were played very straight. It was only the main characters who were portrayed as idiots - but not because they were black. Having listened to a bunch of the shows, I've only heard their race mentioned in any way at all maybe a handful of times. If you went into it blind and listened to a random episode without knowing any of the history, you might think they were just a couple of dumb Southerners. Context, intent, etc.