What about intelligent people who just happened to learn enough about a conspiracy theory to believe it but not enough to know how wrong it is? I know quite a few of those, and calling them stupid will just make them dig in their heels.
Well, there's an oxymoron right there. People who dig their heels in when they get called stupid are, IMO, just confirming what they have been called.
Gillianren, you may be prepared to give CTs, HBs, twoofers, etc the benefit of the doubt. I am not. If they have advanced to the stage where they are pestering people like Brian Cox and Neil De Grasse Tyson with their inane CT theories then they have long abandoned any willingness to learn, and are well beyond any sort of redemption.
PS: Do not mistake this for me thinking that they must have mental illness/issues. Like most people, I use terms such as
"stupid",
"nut job",
"idiot" and
"feeble minded" in the figurative sense not the literal sense. I understand well that it is not uncommon for people to suffer from mental illness and still be very intelligent.... Howard Hughes, David Helfgott, John Nash, Sir Isaac Newton, Kurt Godel et al. There a large body of evidence to suggest that there really is something to the "Mad Scientist" stereotype, and that highly intelligent people can be more prone to mental issues.
The old saying that there is a fine line between genius and insanity has elements of truth!