And Parklnd personnel and Secret Servicemen all said nothing, for the next 50+ years? because?
the second Oswald is out there, on the prowl?
What Parkland personnel and Secret Servicemen would that be, exactly?
The most important part of using a decoy operation is that, except for those directly involved, nobody knows anything about it. A decoy is about misdirection. When Kennedy was declared dead everybody left the emergency unit. The last persons, we know of, to see the President at Parkland were the people who put his body in the ornamental casket. What happened after that is anybody's guess.
Just how long after the body had been placed in the ornamental casket did the Secret Service men steal (because that's what it was) the casket? Could all the commotion about taking Kennedy to Washington have been the distraction they needed to sneak the shipping casket out of the hospital? It's a hypothetical scenario but can it be dismissed as wrong?
Do you have another plausible explanation for how Paul O'Connor and others could have removed Kennedy, in a body bag, from a grey shipping casket? There needs to be an explanation for that, unless of course you dismiss their combined testimony to the HSCA as lies. Are you one of those people who does that?