[jammer]

Ummm. At least the first part of your argument seems to be that the FBI just wouldn't do such a thing. But then, of course, we know that they not only would do so, but that they have done so. At Waco. In their labs. It's one thing to call people tin-foilers, and many are. But it's another thing to be an ostrich and dismiss all evidence to the contrary on the basis of organizational image.

[eno_]

If Whitey Bulger and the Winter Hill Gang could turn at least one FBI agent and get away with multiple murders for decades in Boston, if Hanssen could be turned by the Soviets, if Waco and Ruby Ridge could be so corruptly covered up... just how wild is it to think Al Quaida might have either gotten to or turned at least one FBI agent?

This is, in fact more plausible than some black helicopter theory of the motive behind things.