There are a lot of attempts to dismiss whistleblowers by attacking their "credibility" lately. There is only one criteria to assess: is their report true? You

There are a lot of attempts to dismiss whistleblowers by attacking their "credibility" lately. There is only one criteria to assess: is their report true? You assess this by investigating what they claim in their report. So far, what he's said has been entirely backed up by facts. His reason for blowing the whistle in the first place is irrelevant.