Has everything to do with protecting the CIA. Even if Veciana was completely full of crap ..it doesn't exonerate the notion that rogue CIA operatives were behind offing JFK.
You can focus on Prancer and disavow his credibility as a flying reindeer and therefore smash the whole idea of a Santa and his sled. A silly analogy? That is what I think about Oswald's supposed trip to Mexico...all alone with no apparent funds or support.
At least two people came forward and said that he was in Dallas at that time. Either way, someone was handling him.
Your anecdote has absolutely nothing - not a thing - to do with Tracy's work investigating Veciana's claims.
The topic is about Antonio Veciana. And his allegations that he worked for the CIA and that, most important, his control officer was David Atlee Phillips and that he, Veciana, saw Oswald with Phillips.
Tracy, along with Newman, have shown, to me, that Veciana's allegations simply cannot be true. Or to be more charitable, there is no evidence for them.
Nothing in Tracy's post/writings has anything to do with Dulles. Nowhere does he claim that his work on Veciana - and only Veciana - disproves your entire "the CIA did it" allegations. He's limited things to one specific claim.