I'm afraid you'll find Tricky believes in it to some extent.
If he believes the tosh 'The Prophet Farage' dishes out, this is just another step along the same path.
Anyway talking of conspiracy theories, I admit, I once fell for it in regards to today's date 22nd November. The assassination of JFK.
Until I had a long discussion with a Texas detective and we examined the facts as policemen. Based on the facts and evidence and until contrary evidence is produce, there's nothing to refute that Lee Harvey Oswald was the lone gunman. And there's no conclusive evidence to suggest that a certain group or person was behind him.