Do you know who is responsible for determining what is criminal and what isn't? A judge and/or jury. That's the way our system works. That's the risk for whistleblowers. They have to be prepared to go to trial to determine if they get protected.
Seriously - in "A Few Good Men" Jessup went to jail for ordering the beating of a soldier. That has absolutely no bearing on this.
Godwin's law came about for a reason - using Nazis as an example is overdone. Its like comparing software to cars - it's an overused analogy. Because of this, you lose most of the power your argument may have had. Pick something else if you want to point out how ridiculous something is.