The thing you have to keep in mind about blackface is that it is a marker for a period in time where it was popular to dehumanize and make light of the suffering of Black Americans.
Whenever you see white people doing it, whether they be young or old, they are keeping this tradition alive. Further, we still constantly see these attitudes at play today.
It keeps coming back b/c white America still has yet to deal with that history.
https://www.npr.org/2019/02/08/692823582/virginia-blackface-scandal-draws-attention-to-the-dehumanizing-impact-of-blackfa
