Here's a correction OP for 50 Reasons, 50 Years OP

[William Seger]

31. d) Mexico City

> whatever happened there, the CIA's handling of their own files showed that, as they would admit much later, the agency had an "operational interest" in Oswald. This is not what the official story tells us. Oswald's background was deliberately covered up by the Warren Commission, and agencies such as the CIA practiced lies and deceptions with this subject. There would have been no need for such a cover-up if the official story was actually true. It is not.

And, of course, if any part of the "official story" is wrong, that means there was a conspiracy, huh?

The CIA had an "operational interest" in Oswald because he had defected to Russia and when he returned, he started that pro-Castro FPCC chapter. Trying to infer a conspiracy involving the CIA from that makes no sense at all. To conspiracists, everything that happened or didn't happen implies a conspiracy, but in this case the documentation you're referring to actually makes is less plausible that the CIA was involved in any such conspiracy.