Not really. It was common knowledge at the time, but ignored by the state run media in this country.
It fits right in with the clandestine wars the Dept of State had waged using the CIA as their army. Read up on what State did in Laos in the 60s. There have been more, and it takes years for the truth to come out.
It was not common knowledge it’s just a wild eyed theory with no evidence whatsoever. Pointing to past events can produce any outcome to an argument you want. That’s ridiculous.