Dude is fascinating and I can see him genuinely thinking that.
He was a mentally ill fail son to a wealthy oil family, who mistreated him and sent him away to both dodgy MKUltra linked hospitals and just paid him to do the bohemian thing and stay away as an embarrassment.
His family also happened to be extremely close contacts with the Bush family, knowing them from the oil business, living in the same small town at one point, being big donors to both Poppy and W's campaigns, and also being associated with the CIA front World Vision that was a big Bush initiative.
When he was previously caught by airport security with three guns arriving on the same day and similar time as Carter (another guy hated by Bush) they just let him go, supposedly without even running a background check.
Obviously, if he'd got Reagan, Poppy would have become President as his VP.
But the other weird interplay is that Neil Bush had been staying at the Hinkley's house, while John Jr was there, before the assassination attempt and was going to meeting another member of thr Hinkley family for dinner the day afterwards - allegedly to try and smooth over or help out with the news that Reagan's admin was allowing the state to bring a $2m fine against the Hinkley's oil company.
And there's a whole load other bizarre facts that link Hinkley, the Bushes, the CIA, and the MKUltra fuckery in hospitals like St Elizabeth - where Hinkley was later sent.
