If Burkett plays a part in these memos, then the key to his reasoning is crucial to understand how and why he obtained these phoney documents.
Bill Burkett in his own words.
Newsweek's article -- I presume it was Isikoff's, who is a good journalist as his performance in Monicagate shows -- made the point that Burkett is a classic Dudley Do-Right, whistleblower type. If he got a burr under his saddle at Governor Bush and his political types (Joe Allbaugh is a certified Bush Kool-Aid drinker deluxe), then yes, he'd be like a dog with a bone, and it wouldn't mean he's nuts. Let's be fair. He isn't impartial, and he may even be biased, but careful about saying he's "delusional", if he says he was in the room when the political people started talking about scrubbing Bush's service file.
Because, let's face it, there was something to scrub -- that order to report to the Denver ARF office, which I looked at, nobody is contesting as a genuine document, and likewise his separation paper from the Texas ANG. Bush either booted or gundecked his last year of obligation to the ANG, in order to help someone out in an Alabama campaign, and then to enroll in Harvard. The degree to which Bush took his ANG obligation seriously is fairly open to question on the extant documentation, and so it isn't outside the realm of possibility that Burkett attended a meeting of the character that he claims took place. Bush admits he took his life less seriously than he should have when he was younger, and it's understandable that Bush's political people would have their hair on fire if they found out that a fat file was still extant that had uncomplimentary fitness reports, administrative thundergrams, and various other signs of official displeasure in it.
If Bush and his political aides decided not to go the full-hangout route about his drinking and goofing off, that was their decision. I think it was a mistake, given Bush's reconstruction of his life later on, but people will differ. But the point is, none of this (yet) warrants taking it out on Burkett, if he bristled and decided to be a pain in the ass over issues he had with Bush's performance.
Now, if Burkett is finally the source of the forged memos (but see Dallas Mike's post above), then all bets are off -- hang him high. But not yet.