Some of these people like Chuck Jones and Bob Clampett lived well into the latter half of the 20th century. Is there any record of people who worked in animation during the golden age where racial humor was very prevalent condemn or defend this kind of stuff? As to the stuff I'm referring to these are some examples I found from all the major studios.
MGM (the original voice has been redubbed in these clips to sound less offensive)
In general there's a culture of embarrassed silence about this, with the companies that own the work quietly cutting the offensive scenes, or simply not ever taking some work out of the vault ever again. It's not uncommon to be watching an old short and see a distinct gap in the narrative where a blackface gag was clearly cut out; you have to actively hunt down "Coal Black", "Song of the South", "Coonskin", or any number of wartime shorts that demonize the Germans and Japanese where the racial humor is so much part of the fabric of the cartoon that you can't cut it out.
Most interviews I've seen that touch on these issues have a common theme from the people who worked on them: "it was a different time, everyone was doing it, yes I'm really kind of embarrassed by it now, I'm sorry." Often followed by "Can we talk about my new project instead please?" if the Aged Master Animator was still working. "We were just as cruel in our caricatures of our own ethnicities" is a popular defense if an interviewer pressed on this issue. Which is true; you can see a lot of broad and often biting caricature of the Jewish culture of New York in the work of the Fleischer studios, for instance.
Clampett's black cartoons are and specially interesting case; he and his crew were fascinated with the energy of the jazz scene, and there's a real mix between stereotyped depiction of giant rubber tire lips and keenly observed caricature in some of them. (The Wikipedia article on the "Censored Eleven" has an unsourced quote from him on that.) (eagerly awaiting my downvotes for being a lazy person who cites wikipedia)
Sadly I can't cite anything offhand beyond "I was obsessed with animation from the early 70s until the early 2000s when I started working in the industry and burnt out", but hopefully this will do until someone actually comes along and digs up interviews!
(I was also kinda shocked by the attitudes expressed when the Gulf War started; the studio I was at had a lot of young animators from the less cosmopolitan parts of the US, some of whom expressed a desire to return to the good ol' days of culturally-sanctioned racist cartoons in no uncertain terms. Animators can have trouble seeing the forest for the trees when a few of the trees are amazing works of technical prowess, myself included - I've got a cel from Bakshi's "Coonskin".)