Oswald's ring is probative of Oswald's guilt when viewed in context with the totality of evidence and circumstances. That has been explained multiple times now.
Repeating a fallacious argument over and over again doesn't make it sound. The ring is probative of nothing. It's padding your case with non-evidence.
The problem is not with the explanation (accepted by historians) but your dishonest approach to this case. Attempting to set the ring apart from the totality of evidence against Oswald, as though it is a completely independent event of his other actions, is just an Internet kooks attempt to play defense attorney. That is beyond my power to correct.
No, it's an Internet kook's attempt to play prosecuting attorney: assuming a causal effect between two events merely because you
want there to be one, and attempting to use it as rhetoric to prop up a weak argument.