Maybe the question that needs to be answered is why do so many people believe it is a conspiracy. Originally people looked at it with a jaundiced eye. Is it because he was a president, in Dallas, a carcano, or the fact LHO was shot in the presence of so many cops in their police station and in their custody?
For many years, or even decades, I wasn't all that interested in the JFK assassination and I simply accepted the WC narrative that Oswald was the lone shooter. I had no real reason to doubt the official story, simply because I never looked into it. That all changed when I had a conversation with a friend I very much respected because of his logic and common sense approach to a wide range of issues. He was telling me that, although it could not be ruled out that Oswald was in fact the lone shooter, there simply were too many discrepancies and unresolved issues in the official narrative for it to be be true. The bottom line, according to him, was that the evidence in a simple murder case is (or should be) conclusive in such way that there is no room for reasonable doubt and in this case there were way too many issues that couldn't be resolved by simply putting it down to bad investigative conduct or human error.
That's what got me interested and on the recommendation of my friend I decided to read the Warren Report and check it against the known evidence, not only what's in the 26 volumes but also what came out since, and I couldn't believe what I was reading. What got me the most was
what wasn't there! You had Specter introducing CE 399 into evidence, during the testimony of Dr. Humes, subject to later proof, that was never produced and not showing that bullet to Tomlinson, for identification, during his deposition. The way they tried to discredit Victoria Adams, without even taking testimony of Styles and Garner. And then there was the "search" of the limo, before Frazier and his team could get there. They were simply handed some fragments of bullet that - they were told - were found in the limo. And it goes on and on....
That's when it hit me; it may very well be that Oswald did in fact kill Kennedy, but with him being conveniently dead, they simply wrapped the case around him, which makes me wonder what really happened, because if it had been a simple case of a guy taking his rifle to work and shooting Kennedy the evidence should show it conclusively and it simply doesn't. There are way too many assumptions and jumps to conclusions that are not supported by the evidence. It turned out my friend, who now has sadly passed away, was right!
The best evidence of the weakness of the case against Oswald is that the LNs are desperate to color anybody who does not agree with them as a CT, because it's easier to dismiss or ridicule a CT than it is to convince with actual arguments a sceptic.