I'm not sure I fully understand what your outrage is. It seems like you're concerned that judgements of acceptability change over time. Is that not to be expected?
Not outraged, just politely criticizing the all-or-nothing attitude. As I cited, the cancelation of Dr. Seuss as an author may have begun. Maybe not. It's fair to wonder about this. I don't much care for some obscure, racist books that will no longer be published. I do care about these obscure books now standing in for his entire oeuvre and making him a de facto, toxic author not worth teaching or associating with. Wanting to tap the brakes on this "cancel culture" is a reasonable response, in my opinion.