The only thing I remember people being remotely close to believing was that Bush was so incompetent that he allowed a terrorist attack to happen.
It’s not really a theory that Bush was an incompetent fuckwit, but it’s highly debatable if they knew enough to stop it.
I definitely remember some people screeing about Bush and Cheney wanting it, but IIRC, everyone was treating it like suspicion at most.
The Epstein conspiracy theory was accepted FAR more readily, but then that’s basically guaranteed to be true to some degree, even if it was truly just the jailors being incompetent fuckwits that wanted to take justice in to their own hands.