Who cares about The Jazz Singer anymore? Does it matter, aside from its place in history, which is mostly due to being the right movie at the right time?
Isn't it just a regressive, racist, and decrepit artifact?
Yes, absolutely hell yes, and in a manner of speaking, I guess so.
Racist and offensive, but it's important to remember the sins of the past.
It's worth mentioning that loads of English comedians (Ullman, Lucas, others) still do black/brown/yellow-face characters in their sketch comedy.