Why is Little Black Sambo racist?

How is that a “nod to reacial sensitivity”? Being too scared to depict a character in the correct ethnicity is being sensitive?

As long as I live I’ll never understand the American hang-up on race. Yes, I know there are lots of very good historical reasons why it is such a touchy subject, but in the 21st century people really should be worrying about more important things than melanin.