They're deploring something they participated in. In the most morally-neutral and non-judgmental terms, that is "inconsistent."

If you do something that you regret either immediately or after a delay, that is customarily communicated by means of an apology. That reconciles the two inconsistent behaviors.

Without an apology, their own participation is what makes it impossible for this to be considered a non-treacherous editorial.

Now add: what the Post did was more severe and "damaging" (assuming you hold that view, which I don't) than what Snowden did. It's like a murderer writing an editorial saying "no clemency for the knife salesman!" Those knife salesmen! They really should be behind bars forever, so innocent and virtuous murderers aren't tempted to use those knives, which of course they must!!!