I read about it as well, and I thought well of it. Anne Frank was “normal”, and the point was that any teen/preteen alive today could have been Anne Frank. All it takse is for a dictator to get into is head (or more accurately, for Hashem to put in his head) to wipe out a specific group, and there you go.
It does not make me a “belieber”?, but in general the guy has been pro-yidden & EY. IIRC he ignored some of the boycott calls when he performed (or will perform) in EY (sorry). Good for Yidden in my book.