They are talking about the whistleblowers, not about others affected by the leak. So it is not the same talking point at all.
Could you expand on why the documents could reveal the whistleblowers?
The more interesting part is: this leak was completely useless. Although the documents are not for the public, they're also not rated as a secret. This means that every politician with access is allowed to tell the press about it, only publishing is not allowed. As we have a useful opposition in Germany there was nothing new in the documents...