They don't teach "Steve Martin 101". Lack of knowledge about SNL forty years ago isn't really an education problem.
Strangely enough, I can spot satirical humor from performers of my parents and grandparents’ generations. I may not always find the material as funny as they did, but I know what it is. These kids are being conditioned to see offenses where none were intended. The social media “hive mind” is part of it too, discouraging any independent thought and evaluation. Are the “Likes” or the “Dislikes” trending?