Right, once upon a time someone on /tv/ was making fun of zombie Simpsons.
An autist saw them making fun of it and claimed that they didn't get the "formerly Chuck's" joke so not all of classic Simpsons was good.
Someone explained it to them.
The autist got butthurt and began spamming "I don't get it" day after day to "prove" that classic Simpsons was never good.
Then it began to snowball, taking on a life of its own.
And now here we are.