UFO believers require a government cover up to explain why they can never prove the existence of aliens. Those men in black are always showing up just in time to hide the evidence. Some JFK CTers need to claim that this case can't be solved for similar reasons. They can't prove an alternate conspiracy theory. Nothing adds up much less the existence of any actual evidence that point to anyone except Oswald. Rather, like middling defense attorneys (or Inspector Clouseau) they can "suspect everyone and suspect no one." A lazy but amusing approach that allows them to eat their cake and have it too. After nearly six decades, the bottom line is they don't know what happened. Never will. It just can't be Oswald. If a time machine was invented to allow these types to witness the event, they would gouge their own eyes out before witnessing Oswald pull the trigger.
The classic LN "if you can't prove (with evidence I will never accept) that there was a conspiracy, Oswald is guilty by default"
After nearly six decades, the bottom line is they don't know what happened. And neither do you. You only think you do.
It just can't be Oswald. I have no problem accepting Oswald as the lone gunman, when actual persuasive evidence (and not opinions) is provided to support such a finding. So, go on then....provide it.
Wait, I forgot, you can't show that evidence and blame it on me for asking for something so impossible.