Ok, let me put it another way.
Very broadly speaking there are going to be three groups questioning the 'official' version of events.
The first group (probably a very large group) are those that don't have an inherent hatred of the US, are inclined to accept the official version but would like to see some independently verified evidence. I think I can comfortably say that many of the members of this forum (including myself) would fall into this category. Wouldn't take much and we'd happily accept the official line for the most part. And that is a good thing, yeah?
Then there are the conspiracy theorists. Its going to take a lot of work to convince them that things went down as described but some of them could be convinced, once again with some independently verified evidence. The hard core kooks will always suspect something dodgy is going on. Unless they're heavily armed and unusually agitated they can be safely ignored
.
Finally there are the mad dog jihadists and various other America-hating groups. Doesn't matter what anyone says, they'll either flat out refuse to believe anything on the 'official' line or twist things to their own ends. Nobody around here is likely to have much sympathy for these nutters. Hopefully they'll at some stage receive the gift of the 'pink mist' and soon be at the right-hand side of their chosen diety.