He can't, he is just a treasonous leaker. He is a DS operative and may have had some compensation for his actions. He probably works for the CIA and is twisting in the wind because his lying dossier, which was written by others, shows he got bad information, he dutiful passed it along for Schiff who underestimated DJT.
How can a CIA guy be a “Whistle blower?”
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If he’s anything like Cofer Black or John Brennan or George Herbert Walker Bush he could be, doesn’t take much $$$ under their nose to do what people want...
Now that THIS whistle blower is fake, there is another one waiting in the wings...