The Simpsons debuted 30 years ago this year and there are plenty of 30 year old comedies that are extremely objectionable by current standards. It isn't always fair to criticize that comedy since it is important to always judge art in the context in which it was originally created. However, The Simpsons is still running and therefore needs to continue to justify these decisions today and into the future. No one was suggesting that the character should be edited out of past shows or anything, but the show shouldn't be immune to present criticisms about shows created in the present just because the mistake originated 30 years ago.
I strongly disagree. I very much remember how my dad (an immigrant to the US) felt about it when he saw the Simpsons in the 90s; I remember how obvious the racism was when he pointed it out. Just because you were oblivious to how it made people feel doesn't mean it didn't make people feel horrible.
This historical relativism crap is really just a cheap copout for not taking the time to ask: "is what I'm doing going to hurt or demean someone?" If the answer is yes, dont do it, it doesn't matter how many people are accepting of it at the time. If the answer is "I don't know", ask the person it might hurt.
The reality is, people largely didn't care how others were impacted by the things they did and giving them a lazy and thoughtless copout is nearly just as demeaning as the original actions.
(Think about it, all those guys getting negatively swept up in the metoo movement claiming that they didn't know any better with regard to sexual harassment sounds absolutely absurd; putting "historical context" on racist things is equally as absurd)
(People who are not minorities usually dont come close to understanding how racism feels; I look and sound "white" and it was always troubling to see how my dad who doesn't look or sound "white" was treated relative to me; it's painful to see all the microaggressions that my friends deal with on a daily basis (in a place as liberal as socal) and to see comments like this trying to invalidate the damage done because of copouts like historical context is incredibly disheartening because it makes me realize how far away we are from the point where we no longer treat people like second class citizens because of their grouping)