Even if he didn’t, whatever happened was sufficiently alarming to him that he has been willing to go public (knowing backlash likely to result) - so it would be no surprise that other Nats (those with an ethical backbone) were alarmed by it too
Steps need to be taken to determine if the evidence is indicative that a law was broken; and the person or persons who broke the law should be prosecuted, not the leaker
That’s unethical Dirty Politics.