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People who agree with the "official" version of what happened that day can't understand how the "conspiracy" people can believe what they do based on the evidence and information they've seen, and the same thing applies the other way around. This article talks about how that divide came to be and is extremely unlikely to be bridged. But the comments are mostly saying, "My side of things is right, why can't the rest of you see that."
There are a lot of whacky folks out there, quite a few on the "conspiracy" side of the argument..
But given that any number of conspiracies in the past have finally come to light, sometimes after many decades (see Tonkin Gulf), those who do not automatically buy the official story actually have a more reality based view than those who do not.
The real whack jobs are those who believe what is essentially the unsupported words of proven liars, the believers in the official story.