It’s a few people pointing out that it had an all-white cast and some casual sexism and maybe homophobia I believe. These are all true. It’s a product of it’s time. Most of these people don’t make a huge deal out of it. But it’s good to acknowledge what was done wrong in the past, in order to avoid it in the future. Compared to other stuff, like say American Pie, this isn’t offensive at all. And no you don’t really have to be that careful with comedy now, people are just becoming increasingly aware that comedy at the expense of groups of people is bullying and it’s not okay. There’s a difference between making fun of something and making something funny. It’s not always okay to do the first one. It’s why we tell kids not to make fun of other kids after all. I honestly wish more writers or directors acknowledged how certain things have aged badly in older stuff. It shows personal growth.