It's not at all clear to me why an investigation into the identity of the betrayer "tarnished Anne Frank's memory and the dignity of Holocaust survivors". This

It's not at all clear to me why an investigation into the identity of the betrayer "tarnished Anne Frank's memory and the dignity of Holocaust survivors". This looks to me like the worst kind of gatekeeping: gentiles aren't allowed to do research on Jewish heroes. Perhaps the BBC article is just really badly written.